Questions Asked on
February 27, 2011

  1. Calculus

    I'm a bit confused about the average equations with integration. I need to solve this problem, and I think I'm supposed to use substitution, but I can't get it to work. The problem looks like this: z(t)=4tsin(t^2), [0,π^1/2] Any input?

    asked by Rachel
  2. Week 4 COM155

    Second, write five sentences in which you address changes in your writing. I'm not exactly sure where to start with this one? The weeks readings were on word use, commonly misused words, and spelling. I'm not asking for any answers I just am not sure what

    asked by BballBabe65
  3. Math

    Find the perimeter of the cord r=a(1+cos theta)

    asked by Current puestio
  4. chemistry

    If 5.00 g of steam (H2O)(g) at 100 C condenses to liquid water (H2O)(l) that is cooled to 50.0 C, how much heat is leberated in calories and kilocalories?

    asked by Celeste
  5. trigonometry (repost) Mathmate

    Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30" Using the previous values, a=21.46 b=46.28 C=32-28-30=32.475 We have A+B=180-32.475=147.525 a+b=67.74 a-b=-24.82 tan((A+B)/2)=3.433633

    asked by Anon
  6. management

    what is the definition of the following,please help me.. Maslow’s Hierarchy

    asked by jessie
  7. management

    what are the 6 COMMUNICATION APPROACHES

    asked by jessie
  8. Yr 10 PE

    I don't seem to understand this question can you please paraphrase this. Task Outline: Outline the purpose of ONE health promotion initiative related to road safety, assess the effectiveness of this initiative and justify funding for road safety

    asked by Emily
  9. ap chem

    ok, i'm given: Ethylene Glycol C2H6O2 is the main ingredient in antifreeze. density of pure EG: 1.132 g/mL Anti-freeze is 32% by volume EG I have to find: Volume of Eg in 1 L Mass of Eg in 1 L & the Volume of "solvent" in 1 L Can someone help me? and give

    asked by dylan
  10. maths

    A floor is covered by 800 tiles measuring 10 cm square.How many square tiles of side 8 cm would be needed to cover the same floor?

    asked by sweety
  11. maths

    the distance from hertford to st albans is 32 km. how far apart will they be on a map of scale 1:50000?

    asked by sweety
  12. maths

    1) The 17th hole at the famous st andrews golf course is 420 m in length.How long will it appear on a plan of the course of scale 1:8000? 2) On a map of scale 1:15000,the distance between the buckingham palace and brixton underground station is 31.4cm.

    asked by sweety
  13. Geometric

    1) The sum of last three terms of GP having n terms is 1024 time the sume of first 3 terms of GP. If 3rd term is 5. Find the last term. 2) The sum of the first eight terms of a GP is five times the sum of the first four terms. Find the common ratio.

    asked by Sniper
  14. Permutation

    In how many ways can 5 boys and 5 girls be seated around a table so that no 2 boys are adjacent?

    asked by Rey
  15. 12th grade, Advance Algebra

    How to press the value of log, to evaluate log, to find the unknown log using EL-531WH, advance D.A.L

    asked by Eunthin
  16. math

    Insert 3 numbers between15 to 17 such that the terms from an Arithmetic progression

    asked by shakira.shakira
  17. math

    if x,y,z represents consecutive terms in an Arithmetic progression, prove that y is = (x+z)/2

    asked by shakira.shakira
  18. cosines

    I don't know how to reverse cosine decimals into angles. Can you please explain and help me solve these . cos A= 0.28571428571 A= cos B= 0.66666666667 B= cos C= 0.5238089523

    asked by Anon
  19. science

    I need urgent help. Use two diagrams of amnomia molecules to indicate the inter- and intramolecular force

    asked by Obakeng matlakaselo
  20. science

    Differentiate between intermolecular and intramolecular forces

    asked by Sebogodi
  21. ALGEBRA 1

    Cindy will require $15,000 in 2 years to return to college to get an MBA degree. How much money should she ask her parents for now so that, if she invests it at 12% compounded continuously, she will have enough for school?

    asked by amber
  22. science

    Methane is a natural gas, petrol is a liquid and wax is a solid. So explain the difference in phases or states of the molecules/compounds by reffering to the IMF

    asked by Anonymous
  23. Algebra

    Solve the problem. A salesperson gets a commission of $600 for the first $10,000 of sales, and then $300 for each additional $10,000 or partial of sales. Let S(x) represent the commission on x dollars of sales. Find the value of S(45,000)

    asked by brad
  24. Algebra

    What is the domain of: ~4:(4x-8)

    asked by AC2
  25. arithmetic

    State whether the following sequence is arithmetic, geometric, or neither. 0, 1, 4, 9, 16, 25, 36, ....

    asked by Anonymous
  26. Permutations/Combinations

    In how many ways can 5 men and 5 women be seated at a round table if two men must not sit together?

    asked by Newbie
  27. history

    .   Which of the following is true with regards to the Navigation Acts by the eighteenth century?      A. The acts replaced the colonial admiralty courts. B. In general, the colonists despised the acts and smuggling was rampant. C. The Navigation Act

    asked by Anonymous
  28. chemistry

    draw the electronic configurationd for; 1.Iron chloride,2. Aluminium oxide,3. Benzene

    asked by Onke
  29. Math

    Autoparts Inc. produces three types of parts' assemblies: (P,Q,R)and they each require (2,5,3) units of work on machine I and (2,2,4) units of work on machine II respectively. The two machines have respectively (160,190) units of work available per day. It

    asked by Tracy
  30. chemistry

    what is the electronic configuration for;1.Iron chloride,2. Aluminium oxide,3.Benzene?

    asked by leonel
  31. Managerial accounting

    What is the method of inventory costing that assumes the unit product costs should be determined separately for each period i the order in which the costs were incurred? I think it is "process cost system". Is that right?

    asked by Crystal
  32. physics

    A 65 kg object is dropped from rest a distance of 4.3m onto a spring with a stiffness coefficient of 6.2x10^4n/m. How far is the spring compressed?

    asked by Mark
  33. managerial accounting

    Department A had 10,000 units in work in process that were 30% converted at the beginning of the period at a cost of $10,000. During the period, 15,000 units of direct materials were added at a cost of $60,000, 16,000 units were completed, and 9,000 units

    asked by Crystal
  34. Maths

    Factorise x^2+y^2

    asked by Anonymous
  35. management

    please help me to to get the answers for these quesyions below.. I. Odd Man Out: SHADE IN BLUE the letter of the item that does not belong to the group. 1. 4. a. Communication a. Physiological b. Motivation b. Relatedness c. Leadership c. Safety & Security

    asked by jessie
  36. math

    1) 3x square-4x+7 2) 4x square-5x+6 3) 2x square-4x+3

    asked by shakira.shakira
  37. computers

    what can be done using computers in medical billing and coding and nursing.

    asked by genna
  38. Chem

    AgNO3 (aq) + HCl (aq) ¨ AgCl (s) + HNO3 (aq) 40.30 grams of silver nitrate and excess HCl, how much silver chloride could you make?

    asked by Gigi
  39. Chemistry

    What? If anything, is wrong with the following sets of quantum numbers. a. n = 2, l = 2, ml = 0, ms = +1/2 b. n = 0, l = 0, ml = 0, ms = -1/2 c. n = 3, l = 2, ml = -2, ms = +1/2 d. n = 4, l = 2, ml = 2, ms = -1/2

    asked by Kelly
  40. calculus

    Find the area of the figure. 17) E ach square is 7 ft by 7 ft.

    asked by Anonymous
  41. algebra

    Sales tax in Pennsylvania is 6%. Create an equation for the total price (cost plus tax) of a purchase in PA in terms of its cost. How much would a person pay for a car whose cost is $32,000? PAY = COST + 0.06 * COST P=C(1+1.06) P=1.06C P= (32,000)=

    asked by PEG
  42. math

    You and your friend each have a coin. For each round, each of you flips your coin. If both coins show heads, your friend pays you $3. If both show tails, your friend pays you $1. If the coins don't match, you pay him $2. Is this a fair game?

    asked by natalie
  43. English

    Need some advice! What to do the with the class for the first time? I don't know the class and they don't know me. They are not children. The youngest person is 20 and the oldest around 35-40- There are 10 of them in the group and they are learning English

    asked by tee
  44. English

    Can you help me check the following sentences I'm doubtful about? Thank you. 1)The dragon tries to kill Beowulf with the flames he blows from his mouth. 2) Beowulf is buried wiht the glory and the gold he had won (?) in his battles. 3) The name Beowulf

    asked by Mike
  45. English

    I forgot to include the following sentences. 1) Other themes are (those of?) the passing of time and the relationship with nature. 2) Beowulf swang up (the same as "raised"?) his towering shield and shook out (the same as "lifted") his sword so hard that

    asked by Mike
  46. Physics

    A woman pushes a lawn mower with a con- stant force of 112 Newtons at an angle of 37degrees with respect to the horizontal. The lawn mower moves at a speed of 20 cm/sec. What is her power output? (1 hp = 746 Watts)

    asked by James
  47. Physics

    In the 1950’s, an experimental train that had a mass of 41000 kg was powered across a level track by a jet engine that produced a thrust of 5.89 × 105 N for a distance of 520 m. Find the work done on the train. Answer in units of J.

    asked by James
  48. Math (Trig)

    a ferris wheel has a radius of 10m and is one meter above the ground. If the ferris wheel makes 1 revolution every 20 seconds, write an equation that gives the height above the ground of a person on the ferris wheel as a function of time if that person

    asked by Meg
  49. business/law

    what is a status of affirmative action today? Have things improved? What does the future hold?

    asked by mery
  50. Physics

    The initial kinetic energy imparted to a 0.1 kg bullet is 1036 J. The acceleration of gravity is 9.81 m/s2 . Neglecting air resistance, find the range of this projectile when it is fired at an angle such that the range equals the maximum height attained.

    asked by Mike
  51. physics

    AHHHHHH Help!! Mass on string of unknown length oscillates witha period of 6.0s What if string length is doubled? amplitude dbl?

    asked by pam
  52. physic

    A 1.0-kg steel ball and a 2.0-m cord of negligible mass makeup a simple pendulum that can pivot without friction about thepoint O, as in the picture below. This pendulum isreleased from rest in a horizontal position, and when the ball isat its lowest point

    asked by Anonymous
  53. Physics

    When a rattlesnake strikes, its head accelerates from rest to a speed of 30 m/s in 0.64 s seconds. Assume for simplicity that the only moving part of the snake is its head of mass 100 g. How much (average) power does the rat- tlesnake need to accelerate

    asked by Mike
  54. Physics

    Karen has a mass of 52.7 kg as she rides the up escalator at Woodley Park Station of the Washington D.C. Metro. Karen rode a distance of 57.5 m, the longest escalator in the free world. The acceleration of gravity is 9.8 m/s2 . How much work did the

    asked by Mike
  55. Physics

    Calculate the speed of an 7.8×104 kg airliner with a kinetic energy of 1.0 × 109 J. Answer in units of m/s.

    asked by James
  56. Physics

    A block of mass 5 kg, which has an initial speed of 3 m/s at time t = 0, slides on a horizontal surface. Find the magnitude of the work that must be done on the block to bring it to rest. Answer in units of J.

    asked by Dave
  57. Physics

    A 1760 kg car accelerates uniformly from rest to 8.8 m/s in 4.52 s. Find the work done on the car in this time. Answer in units of J.

    asked by Dave
  58. Physics

    Rosie (mass 58 kg) pushes a box with a horizontal force of 120 N (26.976 lb) at a speed 25 m/min. What is Rosie’s power output? Answer in units of W

    asked by Dave
  59. math

    If the rate 130 miles per 2 hours is reduced to a unit rate,

    asked by marleshiaw
  60. Quantitative methods

    Assignment Problem 1* Print Media Advertising (PMA) has been given a contract to market Buzz Cola via newspaper ads in a major southern newspaper. Full-page ads in the weekday editions (Monday through Saturday) cost $2000, whereas on Sunday a full-page ad

    asked by Matt
  61. Math

    Could someone please help me to identify what type of misrepresentation or misuse have demonstrated by the statement below. Here are choices only one of them connects with this statement: Which one? “…male children born to women who smoke during

    asked by David
  62. maths

    Make k the subject of the following two equations. 1) 8k+2=3(4k+t) 2)7k+11t=5-9kt

    asked by Beth
  63. Chemistry

    Decomp. of H2O2 with Catalase.I am trying to use the Arrhenius equation in my coursework, but i am struggling to get it to work. I have substituted most of the information in, such as activation energy(23000J), and gas constant(8.314x10-3) etc. The issue

    asked by Suriya
  64. Math

    A stick 80 centimeters long makes a shadow that is 50 centimeters long. At the same time of the day, the shadow of the tower is 25 meters long. How high is the tower?

    asked by June
  65. energy

    one litre of liquid methanol will occupy how much volume in the state of vapour at 60 deg. Celsius?

    asked by selvi
  66. math

    integration of cot^4(1-2x)dx

    asked by daniel
  67. Science

    What minimum acceleration must it engines produce if the airoplane has become airbome after starting from rest and travelling a distance of 300m on the runway

    asked by Nobuhle
  68. ROI and NPV

    In the following problems, you will calculate the “simple metrics” for project selection. For these problems, please use the following data and assume discount rate (interest rate) of 0.06. Project A The upfront cost of the project is $500,000. This

    asked by Anonymous
  69. math

    what is 4 over 100 in simplest form

    asked by Olivia
  70. chemistry

    describe an alternative method to prepare a 0.2M potassium phosphate buffer using KH2PO4 and KOH

    asked by kabelo
  71. Chemistry (Math)

    A chemist pours 200 grams of a liquid (density = 2.5 gm/mL) into a cube beaker with 5 cm edges and a graduated cylinder with a base radius of 5 cm and a height of 5 cm. What is fraction of the liquid that needs to be put in the graduated cylinder such that

    asked by Sally
  72. math again

    what is 1 - % 3 in simplest form? What is 2% in simplest form? SIMPLEST FORMS MUST BE IN FRACTIONS PLEASE:)

    asked by Olivia
  73. Chemistry (Math)

    A chemist pours 200 grams of a liquid (density = 2.5 gm/mL) into a cube beaker with 5 cm edges and a graduated cylinder with a base radius of 5 cm and a height of 5 cm. What is fraction of the liquid that needs to be put in the graduated cylinder such that

    asked by Sally
  74. math again

    what is 1 - % 3 in simplest form? What is 2% in simplest form? SIMPLEST FORMS MUST BE IN FRACTIONS PLEASE:)

    asked by Olivia
  75. Math

    A marble is 12mm in diameter. What is the smallest height box that is 96mm square that can hold 200 marbles and still have the lid fit on the box without interference?

    asked by Sally
  76. Science

    Which of the following would typically contain ribosomes? (a) fungi (b) bacteria (c) Archeae (d) viruses (e) prions

    asked by Sally
  77. Physics

    The initial kinetic energy imparted to a 0.1 kg bullet is 1036 J. The acceleration of gravity is 9.81 m/s2 . Neglecting air resistance, find the range of this projectile when it is fired at an angle such that the range equals the maximum height attained.

    asked by Dave
  78. Physics

    A 16-kg child sits on a 5-kg sled and slides down a 143-meter, 30-degree slope, to the nearest m/s what is his or her speed at the bottom?

    asked by James
  79. Algrebra

    The points (1,5), (4,5), and (1,0) represent three corners of a rectangle; find the coordinates of the fourth poin

    asked by Anonymous
  80. physics

    If a masss of 65kg is dropped 4.3m onto a spring with a stiffness coefficient of 6.2x10^4 n/m, how far is the spring depressed?

    asked by Mark
  81. economic

    what are three problems students face when parked on campus

    asked by deb
  82. calculus

    determine the domain for each function f(x)=2x+3,g(x)=x-1

    asked by jason
  83. Algebra

    Find the number of square units in the area of the region in the first quadrant which is bounded by x = 4, the y-axis, y = 2, and y = 8.

    asked by sam
  84. physics

    if you attach a mass to the spring from its initial equilibrium position, it vibrates forever in simple harmonic motion. Why doesn't it come to rest after stretching by a distance 'd'; proportional to the weight of the mass, when the spring's restoring

    asked by ashley --- HELP PLEASEE!!!
  85. Algebra

    How many different points of intersection are there for x + y = 7 and y = x squared minus 7?

    asked by Jack
  86. Chemistry

    Consider a weak acid-strong base titration in which 25.0 mL of 0.100 M acetic acid is titrated with 0.100 M NaOH. a) Calculate the pH after the addition of 3.00mL of NaOH. b) What is the pH of the solution before the addition of NaOH (pKa of acetic

    asked by Jon
  87. calculus

    determine the domain for each function f(x)=x-6, g(x)=3x^(2)

    asked by jason
  88. calculus

    determine the domain for each function f(x)=6x^(2)-x-1, g(x)=x-1

    asked by jason
  89. Chemistry

    If the surface area of a liquid is increased will the rate of evaporation increase?

    asked by sabrina
  90. chemistry

    What is the pH of a solution prepared by dissolving 7.5g HCl in water to make 375mL of solution?

    asked by Brittany
  91. physics

    A car accelerates from 25km/hr to 55km/hr in 30 seconds. What is its acceleration?

    asked by Anonymous
  92. physics

    It takes 214 kJ of work to accelerate a car from 23.1 m/s to 29.3 m/s. What is the car's mass?

    asked by heather
  93. Math

    What's the function? x= 2, y=14 x=10, y=54 x=8, y=44 x=?, y=34 x=?, y=104 x=?, y=31 I thought it was multiply by 5, add 4 but that won't work for the last one where y=31. Help!

    asked by David
  94. Ms. Sue

    Ms. Sue Ive done my journal entries for the immigrant experience thing, and theres just one more thing I have to add at the end-- How has the land-granting system encourages speculation? I don't really know what to say--I was thinking of just ending it

    asked by Sara
  95. ITE

    What is the defenition for research?

    asked by Emily
  96. Physics

    A billiard ball of mass m = 0.150 kg hits the cushion of a billiard table at an angle of θ1 = 60.0° at a speed of v1 = 2.50 m/s. It bounces off at an angle of θ2 = 47.0° and a speed of v2 = 2.20 m/s. a) What is the magnitude of the change in momentum

    asked by Em
  97. APUSH

    in the late nineteenth century: how could trusts purchase a senate seat? what were the sympathies of the national government like?

    asked by Kayla
  98. college physics

    A ball of mass 0.70 kg moving with speed of 1.0 m/!@#$%^&s a wall and bounces back with the same speed in the opposite direction. What is the change in the ball's kinetic energy?

    asked by craig45
  99. math

    -1+(3)(-1)(4)+2=

    asked by alalee
  100. math-calc

    function f(x)=3x^2-2x-1 find equation of the line that is tangent and parallel to 8x-2y+12=0

    asked by shakira
  101. math-calc

    derivate of 2sin(x)-cos(x)-cot(x)

    asked by shakira
  102. math-calc

    find third derivate f(x)=x/x+1

    asked by shakira
  103. Physics 102 (College)

    A few homework problems. 1) The temp of a monotomic ideal gas remains constant (isothermic) during a process in which 4250 J of heat flows out of gas. How much work is done? Pos/neg? delta T = 0 and delta U = 0 by inference Q = 4250 U = 3/2 nRT Thanks for

    asked by Carla
  104. math

    an unbiased coin is tossed 3 times. find the probability that the coin lands heads exactly once.

    asked by Anonymous
  105. potential energy

    An ideal spring has a spring constant k = 20.0 N/m. What is the amount of work that must be done to stretch the spring 0.70 m from its relaxed length?

    asked by henry287
  106. math

    integration of x^2 * cos^2(x)

    asked by chris
  107. physical science

    how gravitational acceleration is used to benefit mankind and the environment.how can rural people also benefit from the use of gravitational acceleration?

    asked by itumeleng
  108. Calculus

    Prove that (2,0) is the closest point on the curve x^2 + y^2 = 4 on (4,0.

    asked by Akira
  109. chemistry

    The simple rule “Like dissolves like” is often used to describe the solubility of a substance in different solvents. Write a short paragraph discussing your evidence for this rule. Include in your discussion where you think this rule works best and

    asked by j
  110. AP and GP

    1) Given the terms a35 = 1238, a70 = 1483 of an AP. Find the exact value of the term a105 a sequence, and sum of sequence. 2) Given the term a3 = 99 and a5 = 891 of GP. Find the exact value of the term a7 of the sequence and the sum of sequence.

    asked by Newbie
  111. science

    what could you infer about the area where you find pecten fossils?

    asked by morgan
  112. Arithmetic

    Given that 3, b, c and 18 are an AP. Find the value of b and c.

    asked by Member001
  113. algebra

    Find the number of square units in the area of the region in the first quadrant which is bounded by x = 4, the y-axis, y = 2, and y = 8.

    asked by Tom
  114. math

    ms.pritchard wrote the following inequality on the board 5.6 with the sign greater on equal to then negative fourteen what should be the solution set for the inequality

    asked by brooke
  115. Ap Chemistry

    explain the difference in boiling points of acetone and 1 proponol. (proponol higher) also explain the difference in water solubility of chloroethane and acetone. (acetone is soluble but not chloroethane)

    asked by z
  116. management

    what are the difference between them.. Democratic Group Authoritative Group Consultative Group Participative Group

    asked by jessie
  117. CHEMISTRY

    Consider the reaction shown below. 4 PH3(g) P4(g) + 6 H2(g) If, in a certain experiment, over a specific time period, 0.0061 mol PH3 is consumed in a 1.9-L container each second of reaction, what are the rates of production of P4 and H2 in this experiment?

    asked by Mattie
  118. Math

    how to multiply amd simplify of -8/63 x 21/32 x -9/42 = Pleas show work or give examples of simular problems

    asked by TK
  119. Physics 102 (College)

    I'm stuck on part B of this question: A system does 125 J of work on environment and gains 79 J of heat in the process. Find change in internal energy (delta U, abbreviated dU)of a. the system and b. the environment. A. Find dU of the system W = 125 J Q =

    asked by Carla
  120. math

    Four balls are selected at random without replacement from an urn containing three white balls and five blue balls. Find the probability that two or three of the balls are white. (Round your answer to three decimal places.)

    asked by Anonymous
  121. math

    A druggist wishes to select three brands of aspirin to sell in his store. He has five major brands to choose from: A, B, C, D and E. If he selects the three brands at random, what is the probability that he will select the following? (a) brand B (b) brands

    asked by sam
  122. Biochem - Diabetes

    Type 1 diabetic injected insufficient insulin so her body can’t use glucose in blood. Blood glucose is 38 mM (normal value = 3.3-5.8 mM). To adjust osmolality, she increased urine output = dehydration. Should she be treated with water? The answer is NO

    asked by Lena
  123. chemristy

    How many mL of 8.0 M HCl must you dilute with an appropriate volume of H2O to prepare a total volume of 260.0 mL of 1.5 M HCl?

    asked by Herman
  124. Laws of Motion

    Two skaters are in the exact center of a circular frozen pond. Skater 1 pushes skater 2 off with a force of 100 N for 1.4 seconds. If skater 1 has a mass of 30 kg and skater 2 has a mass of 74 kg, a) what is the relative velocity (v1 - v2) after the push

    asked by James
  125. Physics 102 (College)

    I'm stuck on part B of this question: A system does 125 J of work on environment and gains 79 J of heat in the process. Find change in internal energy (delta U, abbreviated dU)of a. the system and b. the environment. A. Find dU of the system W = 125 J Q =

    asked by Carla
  126. Laws of Motion

    A student stands on a scale in an elevator that is accelerating at 2.8m/s^2. If the student has a mass of 94 kg, to the nearest newton what is the scale reading?

    asked by James
  127. Algebra

    The five-digit number 31d26 ----- is divisible by 3. Find the sum of all possible values of d.

    asked by Tom
  128. Math

    1. 3+2+1=1+2+3 2. 3(1+4)=(3x1)+(3X4) 3. 9(5+6)=45+54 4. 9+(4+3)=(4+3)+9 5. (9+7)+6=9+(7+6) 6. 5(a+7)=5a+35 A. Associative Prop. of Addition B. Associative Prop. of Multiplication C. Commutative Prop. of Addition D. Commutative Prop. of Multiplication E.

    asked by Hayley
  129. Physics

    If you tried to smuggle gold bricks by filling your backpack, whose dimensions are 55cm* 30cm *16cm , what would its mass be?

    asked by Mia
  130. Chemistry

    Copper (II) fluoride contains 37.42%by mass. Calculate the mass of fluorine(in grams)contained in 55.5 g of Copper(II) Fluoride.

    asked by Trudy
  131. Chemistry

    Calculate the molarity of 15.4 g of ethanol (C12H22O11) in 71.0 mL of solution

    asked by Kiana
  132. science

    A 60.0-mL 0.508 M glucose (C6H12O6) solution is mixed with 115.0 mL of 2.43 M glucose solution. What is the concentration of the final solution? Assume the volumes are additive.

    asked by Kiana
  133. Math

    A 5 feet long ladder leans against a wall and makes an angle of 65 degrees with the ground. find, to the nearest tenth of a foot, the distance from the wall to the base of the ladder.

    asked by Anonymous
  134. Statistics and Probability

    Suppose a basketball player successfully makes 70% of the free throw shots they attempt. Let X represent the number of successful attempts in 120 independent attempted free throws. (A) What is the true probability distribution of X? (B) Find the mean and

    asked by Adam
  135. calculus

    find the area of each circle. use 22 over 7 for pie. and radis for 15 in.

    asked by barb
  136. Math

    Consider the region defined by the inequalities: 0≤x 0≤y -21/4≤y-7/4x y+x≤7 4≤y-3/7x Pick up those points which are the boundary points of the resulting convex region.

    asked by haylie
  137. Chemistry

    The Ka value for ethanoic acid is 1.8x10^-5, what would be the pH of a 2.0x10^-2 M solution of ethanoic acid?

    asked by Rachael
  138. Physics

    Part 1 You are a pirate working for Dread Pirate Roberts. You are in charge of a cannon that exerts a force 10000 N on a cannon ball while the ball is in the barrel of the cannon. The length of the cannon barrel is 2.47 m and the cannon is aimed at a

    asked by Dave
  139. Physics

    part 1 A 1760 kg car accelerates uniformly from rest to 8.8 m/s in 4.52 s. Find the work done on the car in this time. Answer in units of J. part 2 Find the average power delivered by the engine in the first 1.808 s. Answer in units of W. part 3 Find the

    asked by Mike
  140. Chemistry

    The Ka value for ethanoic acid is 1.8x10^-5, what would be the pH of a 2.0x10^-2 M solution of ethanoic acid?

    asked by Rachael
  141. chemistry

    In a reaction involving the bromination of acetone, the following initial concentraions were present in the reaction mixture. acetone (0.8mol/L), H+ (0.2 mol/L), Br2 (0.004 mol/L) At 25 degrees C, it took 240s before the colour of Br2 disappeared. If the

    asked by Mal
  142. chemistry

    how many grams of NaCl (molecular weight 58.5) should be used to prepare 20 liters of a solution containing 154mEq/L?

    asked by mary
  143. statistics

    The population of SAT scores forms a normal distribution with a mean of µ =500 and a standard deviation of σ =100. If the average SAT score calculated for a sample of n = 25 students, a. What is the probability that the sample mean will be greater than

    asked by T
  144. Physics

    part 1 A 1760 kg car accelerates uniformly from rest to 8.8 m/s in 4.52 s. Find the work done on the car in this time. Answer in units of J. part 2 Find the average power delivered by the engine in the first 1.808 s. Answer in units of W. part 3 Find the

    asked by Mike
  145. Anthropology

    1) I have to give out an example of how dogs have evolved, but I don't know any. 2) How has Dr. Francine Patterson's research helped the plight of all animals?

    asked by Alex L.
  146. Physics

    Part 1 You are a pirate working for Dread Pirate Roberts. You are in charge of a cannon that exerts a force 10000 N on a cannon ball while the ball is in the barrel of the cannon. The length of the cannon barrel is 2.47 m and the cannon is aimed at a

    asked by Mike
  147. english

    in tragedy vocabulary. I need the word for the following definition. a device where by the audience or reader understands more of a situation or of what is being said than a character is aware of.

    asked by Pete
  148. chemistry

    why might you not observe a reaction even though an activity series indicates it should occur?

    asked by mel <3
  149. geometry

    To the nearest tenth of a foot, what distance (x) from the building should Tim place the 16 ft ladder so that the top of the ladder will be 12 feet above the ground.

    asked by Kierra
  150. English

    I need the vocab word for the following definiton: Unrealistic devices or procedures that the audience agrees to accept (ex: aside).

    asked by Pete
  151. Stoichiometry Problems

    How many grams of phosphorus can be obtained from the decomposition pf 45kg of POCL3. 2 POCL3 --(> 2P + 3Cl2 + O2

    asked by Ray
  152. socials

    some examples of ads using play on words

    asked by james jackson
  153. chemistry

    For each titration of a buffer, how do i calculate how many mLs of titrant were required to obtain a 1.00 pH unit change from the initial pH?

    asked by Wendy
  154. Chemistry

    If I have 6 mol of N2 and 12 mol of H2 to yeild ammonia, which chemical is in excess and by how much?

    asked by Darcy
  155. biology

    in what categorize does Esctacy belong to? carbohydrate, lipid, protein or nucleic acid and why. can some give me 2 or 3 exaple why is belogs to it thank you in advenge

    asked by tarkan
  156. Cheistry

    When acetone is added to saturated sodium chloride, the equilibrium shifts toward the right. What is the role of acetone in shifting the equilibrium toward the right? any help would be appreciated. My TA is of no use in explaining our lab experiments.

    asked by redgy
  157. capital budgeting

    Retained earning is a free source of funds to the company. Therefore, we can ignore retained earnings when computing the cost of capital. Do you agree or disagree with this statement?

    asked by teresa
  158. calc

    Can someone please show me how to find the integral of sin squared x?

    asked by lo
  159. chemistry

    When acetone is added to saturated sodium chloride, the equilibrium shifts toward the right. What is the role of acetone in shifting the equilibrium toward the right? any help would be appreciated. My TA is of no use in explaining our lab experiments.

    asked by redgy
  160. physics

    A phonograph record has an initial angular speed of 37 rev/min. The record slows to 10rev/min in 1.3 s. What is the record’s average angular acceleration during this time interval

    asked by Kara
  161. College Algebra

    need help in solving how many miles can i drive on 60 gallons of gas, with the Mpg 30 in the city, and 42 highway. I would like all the steps, never had algebra before, so i am very lost.

    asked by Dee
  162. physics

    A 3.00 kg block starts from rest at the top of a 36.0'> incline and slides 2.00 m down the incline in 1.60 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the

    asked by Anonymous
  163. chemisrty

    calculate the percent by mass of carbon(c) in the amino acid arginine,C6H16N4.

    asked by michelle
  164. physics

    A 3.00 kg block starts from rest at the top of a 36.0'> incline and slides 2.00 m down the incline in 1.60 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the

    asked by Anonymous
  165. probability

    Four balls are selected at random without replacement from an urn containing three white balls and five blue balls. Find the probability that two or three of the balls are white

    asked by sam
  166. statistics

    A company decides to investigate the amount of sick leave taken by its employees. A sample of seven employees yields the following numbers of days of sick leave taken in the past. 0, 1, 4, 1,6, 2. Find and interpret the range

    asked by T.
  167. science

    what is the answer to the problem .003m = mm?

    asked by Andrea
  168. geometry (high school)

    if there are two tangent circles that have two external tangent lines that intersect at a 60 degree angle, what is the ratio of the radii.

    asked by Tan
  169. trig

    if cos(pi/4) is sqrt2/2 i thought sec(pi/4) is 2/sqrt 2,but its just sqrt 2 . can some one please explain.

    asked by tom
  170. college algebra

    If an average-size man with a parachute jumps from an airplane, he will fall 12.5(0.2t - 1) + 19t feet in t seconds. How long will it take him to fall 134 feet?

    asked by amber
  171. college algebra

    Find the maximum value of 5x + 7 – x2 on the horizontal span of 0 to 5. (Enter the maximum value of the expression, not the value of x at that point.)

    asked by amber
  172. science

    how do i figure out the science metric conversion of .003 m = mm?

    asked by Andrea
  173. Writing

    okay i have this writing assignment on how drunk driving can be stopped .. i have like three sentences to complete it and these three sentences are to explain how/what harsher penalties can help in stopping drunk driving.. I'm stuck because the following

    asked by Anon
  174. biology grade 12

    My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity (seconds obviously, these are the times it took the enzyme to

    asked by hello
  175. algebra

    Given that XY =21 and 1 < x < 2, find the sum of the upper and lower bounds of Y. Express your answer as a decimal.

    asked by Tom
  176. algebra

    Graph the following equation: clculte the slope, x-intercept, and y-intercept, and label the the intercelts on the graph. problem: Find an equationin slope-intercept form passing through the points (2,5) and ( 7,-3).

    asked by PEG
  177. science biochem- please help!!!!

    I don't know where to start with it? A tube is set up for radioimmunoassay containing antibody with a capacity for binding 1ug antigen. Both labelled (50,000 counts per ug) and unlabelled antigen are added to the tube. Work out a formula to calculate the

    asked by Isabel
  178. math (algebra honors)

    The edge of one cube is 2 cm shorter than the edge of a second cube. The volumes of the two cubes differ by 386 cm^3. Find the edge of the smaller cube using factoring.

    asked by K.S.
  179. math

    A cabaret show is put together by a manager who wishes to present two comedians and three singers. He can choose from 16 comedians and 17 singers. In how many ways can he select the acts for the show?

    asked by Mike Hunt
  180. math (algebra honors) #2

    If the radius of a circle is increased by 6 cm, the new area is 121 (pi) cm^2. Find the radius of the original border using factoring.

    asked by K.S.
  181. physics

    A mesquito whistles a note of 300 Hz, and flies towards you at a speed of 30 m/s. The air temprature is 20 degrees celcius. Before doing any calculations, determine wether you will observe a note that is greater, less than, or equal to 300 Hz (I have

    asked by Taylor
  182. math

    A restaurant offers an "appetizer-plate special" consisting of six selections from its list of appetizers. If there are more than 8000 different possible appetizer-plate specials, what is the least possible number of appetizers?

    asked by ravin
  183. physics

    A 3.00 kg block starts from rest at the top of a 36.0'> incline and slides 2.00 m down the incline in 1.60 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the

    asked by Anonymous
  184. algebra

    Graph the following equation: clculte the slope, x-intercept, and y-intercept, and label the the intercelts on the graph. problem: Find an equationin slope-intercept form passing through the points (2,5) and ( 7,-3). (2+5)/(7+ -3) = 7/4 so y = (7/4)x +b

    asked by PEG
  185. Biology

    how does esctacy work plz i need 3 explanation

    asked by tarkan
  186. Physics

    How much work is needed to lift a 3 kg mass a distance of 0.75 m?

    asked by Lesley
  187. math

    half of a gallon is a half gallon. half of a half gallon is a quart. half of a quart is a pint. half of a pint is a cup. a cup is what fraction of a quart? Is the answer 1/4?

    asked by Trevor
  188. Math

    Construct a truth table for ~q^p

    asked by Niki
  189. Physics

    An arrow is fired vertically upwards by a bow and reaches an altitude of 134 m. Find the initial speed of the arrow on the ground level.

    asked by Lesley
  190. Physics

    A student uses a spring to launch a marble vertically in the air. The mass of the marble is 0.002 kg and when the spring is stretched 0.05 m it exerts a force of 10 N. What is the maximum height the marble can reach?

    asked by Lesley
  191. Physics

    A children’s roller coaster is released from the top of a track. If its maximum speed at ground level is 8 m/s, find the height it was released from.

    asked by Lesley
  192. Physics

    A student uses a spring with a spring constant of 130 N/m in his projectile apparatus. When 56 J of potential energy is required to launch the projectile to a certain height, what is the compression in the spring?

    asked by Lesley
  193. Chemistry

    The pH of a 0.065 M solution of a weak base is 11.70. What is the value of Kb for this base?

    asked by Brian
  194. Physics

    How much work must be done to accelerate an 8x105 kg train: a) from 10 m/s to 15 m/s; b) from 15 m/s to 20 m/s; c) to a stop an initial speed of 20 m/s?

    asked by Lesley
  195. Chemistry

    If each of the salts listed in A through E were dissolved in water to make a 0.1 M solution, which solution would have the lowest pH? a. NaNO2 b. NaF c. AlCl3 d. KNO3 e. Na3PO4

    asked by Brian
  196. Chemistry

    Which one of the following pairs of reactants would react together in a Lewis Acid/Lewis Base reaction? a. KOH and HNO2 b. NaOH and HCl c. CH3COOH and HF d. Ag+ and NH3 e. HClO and NH3

    asked by Brian
  197. Physics

    How much work is done in accelerating a 2000 kg car from rest to a speed of 30 m/s?

    asked by Lesley
  198. Chemistry

    Calculate the concentration of all species in a 0.15 M KF solution. Ka = 6.4 x 10-4 for HF.

    asked by Brian
  199. Physics

    A rock is dropped from a height of 2.7 m. How fast is it going when it hits the ground?

    asked by Lesley
  200. Chemistry

    Calculate the pH of a solution that results from the mixture of 50.0 mL of 0.15 M HCOOH with 75.0 mL of 0.13 M HCOONa. Now, don't forget these solutions are being mixed and you haven't accounted for that yet in the concentrations! Ka for HCOOH is 1.8 x

    asked by Brian
  201. Chemistry

    Consider the titration of a 35.0-mL sample of 0.175 M HBr with 0.200 M KOH. Determine the pH after adding 5.0 mL of base beyond the equivalence point.

    asked by Brian
  202. algebra

    how do you solve 140 s + 120 p = 1540 if your trying to figure out how many cups of juice there is for strawberry and pineapple if it has 120 calories & the strawberry one only has 140 ?

    asked by abril
  203. science

    A ball is thrown horizontally from a cliff a 8 m/s. How fast is it moving 2 s later?

    asked by Brenda
  204. Statistics

    To determine whether themean nicotine content of a brand of cigarettes is greater than the advertised value of 1.4 milligrams, a health advocacy program tests: Ho: mu = 1.4 Ha: mu > 1.4 The calculated value of the test statistic is z = 2.42. ==> How do I

    asked by Emily
  205. social studies

    were the british justified using that amount of force against the french in 1837? use examples from 2011 to help explain your answer

    asked by melissa
  206. math

    how do you do capacity using only gallos

    asked by tangie
  207. Calculus

    Volume problem: y=x^3, x=y^3; rotated about x-axis I first made y=x^1/3, then x^3=x^1/3 Then I tried to do an integration from 0 to 1 with x^1/3-x^3, but I can't get one of the possible answers, which are: A. 16/35π B. 16/7π C. 18/35 D. 7/2 E. 16π Any

    asked by Leona
  208. calculus

    Calculate the derivative indicated. y '(25), y = ãx + 2 x

    asked by Anonymous
  209. advance functions

    Determine the values of a M and N , so that the polynomial 2x^3+mx^2+nx-3 and X^3-3mx^2+2nx+4 are both divisible by x-2. I am so lost, i do not know how to start this problem! please help i have a test soon!

    asked by rani
  210. Physics

    Suppose a motorcycle with uniform motion travels from a position of 5.0km[S] to a position of 20.0km[N] in 0.5h Find the motorcycle's A) displacement B) velocity C) Distance Travelled D) speed.

    asked by Bob
  211. geometry

    A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the lengths of the two pieces.

    asked by shannon
  212. math

    a midwestern music competition awarded 32 ribbons. the number of blue ribbons awarded was 3 less than the number of white ribbons. the number of red ribbons was 2 more than the number of white ribbons. how many of each kind of ribbon was awarded?

    asked by victoria
  213. Chemistry

    you have75.0ml of 2.5 M Solution of Na2CrO4(aq). You also have 125ml of a 1.74M solution of AgNO3(aq)Calculate the concentration of NO3 when the two solutions are added together

    asked by Logan
  214. Math

    How do you find the turning point of a quadratic equation? (The Formula)

    asked by Bill
  215. Dynamics

    A boy of mass m takes a running start and jumps on his sled at position 1. He leaves the ground at position 2 and lands in deep snow at a distance of b = 25 ft. How fast was he going at position 1?

    asked by Demar
  216. History

    The Inuit people of North America are all _______________

    asked by Sally
  217. History

    What did people in the House of Tudor do?

    asked by Sally
  218. Physics

    Physics question on identify the reaction? I am having trouble with the question a, b, and c in this physics problem: One or more external forces are exerted on each object enclosed in a dashed box shown in the figure below. Identify the reaction to each

    asked by Lin
  219. chem

    seawater contains approximately 3.5% NaCl by mass and has a density of 1.02 g/mL. What volume of seawater contains 1.0 g of sodium?

    asked by Anonymous
  220. Calculus

    Let f(x)= (1/x). Use the limit definition of derivative to find f'(x). My professor's answer is: -1/x but I keep getting: -1/x^2 what do I have to do to get that answer?

    asked by Abigail
  221. Geometry

    The date December 31, 2043 can be written in the format 12/31/43. This is an example of a true mathematical statement because 12 + 31 = 43. Suppose I wanted to write dates in the 21st century for Valentine’s Day (which is always celebrated on February

    asked by Anonymous
  222. Physics

    Suppose a motorcycle with uniform motion travels from a position of 5.0km[S] to a position of 20.0km[N] in 0.5h Find the motorcycle's A) displacement B) velocity C) Distance Travelled D) speed.

    asked by Bob
  223. Math

    Find the unit price and tell which is the better buy: A 64 oz. bottle of juice costs $2.39, and a 20 oz. bottle costs &0.79. You can use a 20-cents-off-coupon if you buy four 20 oz. bottles or a 15-cents-off-coupon if you buy a 64 oz. bottle. Which is the

    asked by Sammy
  224. algebra

    Could someone please explain to me how to do this problem, and also what the answer is? I don't understand !! (8x10^4) x (4.43 x 10^9). THANKS SO MUCH!

    asked by stacie
  225. Math

    Find the unit price and tell which is the better buy: Buy one 10 pack of AAA batteries for $5.49 and get one free, or buy two 4 packs for $2.98.

    asked by Sammy
  226. rfvv

    1. You can read whatever magazine you like. 2. You are able to read whatever magazine you like. 3. You may read whatever magazine you like. 4. You are allowed to read whatever magazine you like. (Does #1 mean #2 or #3?)

    asked by English
  227. geometry

    For that problem: A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the lengths of the two pieces. when answering the question why was it 3/5=x/12? where did the 5 come from?

    asked by shannon
  228. rfvv

    1. You can read whatever magazine you like. 2. You can read which magazine you like. 3. You can read that magazine you like. (Which one is right? Are they all grammatical? What is the difference in meaning?)

    asked by English
  229. math

    you intend to create a college fund for your baby. if you get an interest rate of 5.3% compounded monthly and want the fund to have $123,875 after 17 years, how much needs to be deposited each month? and 1 more jessica used a fixed installment loan from

    asked by kayla
  230. Science

    Officials have found certain amounts of hazardous Fe3+ ions in the town of Scienceville's water supply. Using your knowledge of chemical reactions, suggest a way to eliminate this ion from Sciencevills's drinking water supply. Provide a thorough

    asked by Alisha
  231. Math

    If X=11 inches, Y=8 inches, and Z=6 inches, what is the area of the parallelogram above?

    asked by Garrett
  232. math

    give exact and approximate solutions to three decimal places y^2-12y+36=4

    asked by anne
  233. algebra

    solve using the elimination method x+7y=58 -x+4y=30

    asked by jay
  234. college

    At which point in the criminal process does the right to counsel end?

    asked by ev
  235. math

    Please help me... How do I express the following products in scientific notation?? 1)(2.964 x 10^8) divided by (52 x 10^2) 2)(24.5 x 10 ^ negative 8) divided by (3x10^2) 3)(8.1 x 10^ negative 9) x (4 x 10^2)?

    asked by stacie
  236. geometry

    for that some problem: A board that is 12 feet long must be cut into 2 pieces that have lengths in a ratio of 3 to 2. Find the lengths of the two pieces. arn't you solving two parts because the board was cut in two?

    asked by shannon
  237. calculus

    Find the derivative of the inverse for the function f and real number a. f(x)=xrad(x-3) a=4 Please help. Thank you very much for your time and assistance.

    asked by Jake
  238. math

    what is the area of the region enclosed by the graphs of y=2- lx-3l and y= x^2-2x?

    asked by cherry
  239. Algebra 1B

    How do I solve \sqrt{\frac{33xy^{3}}{\sqrt{3x}}}? I am getting so confused and I need help please!

    asked by Laura
  240. Physics - Please Help

    An m = 6.80-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2670 N for 0.110 s. One piece of

    asked by Em
  241. geometrY

    to estimate the height of a tree, Dave stands in the shadow of the tree so that his shadow and the tree's shadow end at the same point. Dave is 6 feet 4 inches tall and his shadow is 15 feet long. If he is standing 66 feet away from the tree, what is the

    asked by shannon
  242. 2 balloons and a doubled distance (physics)

    EARLIER SOMEONE POSTED: "Two like-charged balloons, placed at a distance of .5 meters, experience a repulsive force of .32 N. What is the force if the distance between the two balloons is doubled? If you use Coulomb's Law, the equation used to find .32 N

    asked by help!
  243. gr. 12 biology

    My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity respectively (seconds obviously, these are the times it took the

    asked by paul
  244. Math

    If class starts at 11:50 and lasts 1 hour 40 min how do you write a math equation?

    asked by Anthony
  245. Math(Urgent)

    Differentiate. g(x)=(x^3+1)(3x^2-1) I know that the answer is 15x^4-3x^2+6x but I donot know how to get to this. I was using g'(x) X h(x) + g(x) X h'(x) and I was using the derivatives 3x^2 and 6x but I guess this is wrong. Please help!! Thank you.

    asked by Hannah
  246. algebra

    A rectangular sheet of aluminum foil is 50 centimeters long and 20 centimeters wide, and weighs 5.4 grams. Find the thickness of the aluminum foil in centimeters.

    asked by De Angelis
  247. Biology

    in what categorize does Esctacy belong to? carbohydrate, lipid, protein or nucleic acid and why. can some give me 2 or 3 exaple why is belogs to it thank you in advenge

    asked by tarkan
  248. HCS/335

    can someone help me find a current article relating to this thank you!! Find a current administrative issue in a newspaper, magazine, or journal article relating to topics such as patient privacy, confidentiality, or HIPAA Write a 1,050- to 1,400-word

    asked by bobbi...plz help
  249. pre ap physics

    ** When s conducting sphere is charged positively, initially the charge is deposited on the left side. However, due to the sphere's conducting nature, the charge spreads uniformly throughout the surface of the sphere. Charge is uniformly distributed

    asked by Angela here again
  250. history

    Discuss one example of cultural, economic, or environmental diffusion between your chosen society and another society, either from this list or of your choosing. • Mesopotamia • Indus River Valley • Yellow River Valley • Egypt • Ancient South

    asked by Anonymous
  251. Chemistry

    Please check my answers. 1. Using the equations, IO3- +5I- + 6H+ -> 3I2 + 3H2O C6H8O6 + I2 -> C6H6O6 + 2I- + 2H+ how many equivalents of IO3- are required to produce enough I2 to oxidize one equivalent of ascorbic acid? Answer: 1IO3- 3I2 3C6H8O6 1/3

    asked by Sara
  252. Chemistry

    Calculate the mass of silver metal (Ag) produced from the reaction of 5.58 grams of copper metal (Cu) according to the following reaction: Cu(s) + 2AgNO3(aq) --> Cu(NO3)2(aq) + 2Ag(s)

    asked by Carly
  253. MATH grade 12

    Determine the values of a M and N , so that the polynomial 2x^3+mx^2+nx-3 and X^3-3mx^2+2nx+4 are both divisible by x-2. I am so lost, i do not know how to start this problem! please help i have a test soon!

    asked by rani
  254. Physics

    In an experiment using sodium light (λ=589 nm), the slits are 1.2 μm wide. You notice that every fourth fringes missing. a) What is the slit separation? b) How many fringes appear on the screen?

    asked by George
  255. Math

    The number of calls received by a car towing service averages 14.4 per day (per 24 hour period). After finding the mean number of calls per hour, find the probability that in a randomly selected hour the number of calls is 0

    asked by Katie
  256. Physics

    I just need ideas on how i can estimate the height of a building by using only a tennis ball and a stop watch. I can only measure it by being on the ground level.

    asked by Caitlin
  257. math

    fixed installment loan of $13,500 with 60 months to pay back, monthly payments of $280.24. instead of making 36th payment, pays remaining balance on loan. how much interest saved? use acturial method u= n*p*v/100+v

    asked by kayla
  258. physics- still confused.

    A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, the plates are disconnected from the battery. Describe the behavior of the ball. Thank you so

    asked by Angela here again
  259. calculus

    Find an equation of the tangent line to the curve at the given point. y = 7 sec x P = (π/3, 14)

    asked by Anonymous
  260. Math

    1. 4+7=7+4 2. 9+5+3=3+5+9 3. 5(7+1)=35+3 4. (1+2)+3=1+(2+3) 5. 6(a-3)=6a-18 6. (9+5)+4=5+(4+9) A. Associative Prop of Addition B. Associative Prop of Multiplication C. Commutative Prop of Addition D. Commutative Prop of Multiplication E. Distributive Prop

    asked by Hayley
  261. Calculus AB

    Find the indefinite Integral of: (e^(2x)-e^(-2x))/(e^(2x)+e^(-2x))dx Thank you very much for your help.

    asked by Jake
  262. algebra

    Find the number of square units in the area of the region in the first quadrant which is bounded by x = 4, the y-axis, y = 2 , and y = 8.

    asked by george
  263. art

    he is a artist I am at work, and have done much, but I wish I had eight pairs of hands and another body to shoot the specimens.

    asked by love of this country
  264. physics

    A charge of .250 C moves vertically in a field of .500 T that is oriented some angle from the vertical. If the charges's speed is 2.0 x 10 ^2 m/s, what angle(s) will ensure that the force acting on the charge is 5.0 N?

    asked by Adam
  265. physics

    A charge of .250 C moves vertically in a field of .500 T that is oriented some angle from the vertical. If the charges's speed is 2.0 x 10 ^2 m/s, what angle(s) will ensure that the force acting on the charge is 5.0 N?

    asked by Adam
  266. chemistry

    Commercial breathalyzers contain .75 mg of K2Cr2O7, 1.5 mL of H20 and 1.5 mL of H2SO4. What is the concentraion of the dichromate in the solution?(the acid is a solvent) don't want answer just want to know how to work it out.

    asked by Anonymous
  267. English

    Is "after the hurricane" a pharase or clause?

    asked by Dan
  268. Chemistry

    Please help me with these! Thanks :) Describe, in detail, how to make 5.5 liters of a 2.5 molar HCl solution from a 10.5 molar HCl stock solution. How many grams of a stock solution that is 85.5 percent H2SO4 by mass would be needed to make 150 grams of a

    asked by Amanda
  269. Chemistry - physical, chemical and nuclear process

    A healthy human body maintains a temperature of about 37.00C. Explain how physical, chemical and nuclear processes all contribute, directly or indirectly, to keeping the human body at a constant temperature.

    asked by Farah
  270. Math(Urgent)

    Compute the maximum product for two positive numbers x and y with the property that the sum of the first plus five times the second is 5000. 1) Indicate the objective equation 2) Indicate the constraint equation I put x+5y=5000. Is this correct.

    asked by Hannah
  271. math

    Write an expression for the sum of the squares of two consecutive integers. (Use x for the integer.) 1 Simplify that expression. 2

    asked by jannette
  272. English

    After we did two types of sand together, he did the rest on his own. or After we had done two types of sand together, he did the rest on his own. Which one is correct?

    asked by Pete
  273. gr. 12 biology

    My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity respectively (seconds obviously, these are the times it took the

    asked by paul
  274. finance

    Adams Enterprises’ noncallable bonds currently sell for $1,120. They have a 15- year maturity, an annual coupon of $85, and a par value of $1,000. What is their yield to maturity?

    asked by david
  275. Math

    Find the critical values of P(x) p(x)= (28+x)(8-x/4) the answer was p=244-7x+8x-x^2/4 p=-x^2/4 + x + 244 p'= -x/2 +1 = 0 X=2 My question is, I do not understand how they got -7x + 8x at the beginning. I know (28)(8)=244 but I do not get the rest.

    asked by Hannah
  276. physics

    Each Steel Rail is 8.0 m long and has a cross sectional area of .0025msquared. on a hot day, each rail thermally expans as musch as 3.0 X 10EE-3. if there were no gaps between the rails, what would be the force on the ends of each rail?

    asked by Roxy
  277. math

    i gave away 20 marbles leaving 60%, how many marbles did i have

    asked by a
  278. chemistry - human calorimeter

    From experience, you know that you produce significantly more heat when you are exercising than when you are resting. Scientists can study the heat that is produced by human metabolism reactions using a ‘human calorimeter.’ Based on what you know about

    asked by Farah
  279. Missouri

    Calculate the mass of 2.50 x 104 molecules of nitrogen gas?

    asked by John
  280. Social

    How does capital help human productivity in relation to farm labor, office help, teaching, or government administration? I know capital is a source of income/money and it provides funding for school and teachers. How does it affect the government

    asked by Jon
  281. Algebra II

    I should know where to start, but I have a brain freeze. Will someone get me started? a^2 + b^2 = f^2, solve for a thanks :)

    asked by Nancy
  282. chemistry (urgent)

    Commercial breathalyzers contain .75 mg of K2Cr2O7, 1.5 mL of H20 and 1.5 mL of H2SO4. What is the concentraion of the dichromate in the solution?(hint:the acid is a solvent)

    asked by Anonymous
  283. Calculus

    Let f(x)= (1/x). Use the limit definition of derivative to find f'(x). My professor's answer is: -1/x but I keep getting: -1/x^2 what do I have to do to get that answer?

    asked by Abigail
  284. English

    how can you interpret this quote: "the things we're drawn to satirize are, in many cases, the things we're most wary about in ourselves"

    asked by Titi
  285. Chemistry- please help

    How do I go about preparing 50% ethanol and 70% ethanol from 95% ethanol?

    asked by michelle
  286. physics

    a skateboarder is skating over a circular bump. she is at the top of the bump and is moving with a speed of 5m/s. Is the normal force exerted on the skateboarder by the bump greater than, less than, or equal to the weight of the skateboarder? explain.

    asked by tae
  287. English

    As you know, Anne frequently refers to how much she appreciates and enjoys nature. Why is nature so important to Anne? What does nature represent that she so desires? How do Anne’s passages on nature in the diary affect her mood and affect the mood of

    asked by Roxy
  288. AP World History

    Comparing the four Classical Societies, in essay format, of China (Han & Qin), India (Gupta empire) and Rome and Greece. I really need a good essay because I lost mine the day it was due and now it's late.

    asked by Erin
  289. Physics

    An m = 6.80-kg clay ball is thrown directly against a perpendicular brick wall at a velocity of 22.0 m/s and shatters into three pieces, which all fly backward, as shown in the figure. The wall exerts a force on the ball of 2670 N for 0.110 s. One piece of

    asked by Haley
  290. accounting

    did these questions ever get answered

    asked by rob
  291. grammar

    what is the simple subject in the sentence- thier apple does not smell very good.

    asked by traci
  292. math

    of the following which is the closest approximation to the amount of time it takes to read a 487-page book at the rate of 25 pages a day ? a. 20 days b.25 days c.15 days d.10 days e.30 days

    asked by nylija
  293. Mathematics

    Patrick has a summer job passing out flyers for a store. Each flyer weighs about 0.55 ounce. If he is given a bundle of flyers that weighs 16.5 Ibs , how many flyers must he pass out ? [ Help or Answers are appreciated greatly. Thank you. ]

    asked by Miranda
  294. Physics

    A bottle has a mass of 34.20 g when empty and 91.91 g when filled with water. When filled with another fluid, the mass is 86.24g . What is the specific gravity of this other fluid?

    asked by Mia
  295. Math

    Describe one real object with the given shape. Explain why you might want to find the volume of the object. Triangular prism

    asked by Help plz
  296. Mathematics

    Which set of ordered pairs are on the graph of the function y = 1/2 x - 2 ? F (-4,0) , (6,-5 ) G (-4,0) , (6, 5 ) H (4,0) , (6,-5 ) J (4,0) , (6, 5 ) Help ? Please.

    asked by Kelly
  297. math

    Solve for x: log3(x^2-4)-log3(x+2)=2

    asked by julie
  298. english

    • Use at least five adverbs and five adjectives to write a 150- to 300-word review of a movie, sporting event, musical performance, or television show. • Bold each adverb. • Underline each adjective. Here is what I wrote, but I am having trouble

    asked by Havingtroublehere
  299. Physics

    Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 66 kg student to accelerate downward at 9.8 m/s2, determine the upward accelera- tion of the Earth during the student’s fall.

    asked by Carrie
  300. math

    Find the slope and y-intercept for the line. Assume a = 4, b = 2, c = -4.

    asked by jannette
  301. Mathematics (Help? Please. )

    Two parallel lines are cut by a transversal. Angles A and B are adjacent exterior angles. Angle A measures 87 degrees. What does Angle B measure?

    asked by Barbie
  302. English

    I am trying to analyze Wendi Kaufman's "Helen on Eighty-Sixth Street." I do not understand what Vita's mother means when she says "Truth is beauty and beauty is truth..." Please explain the meaning of this quote.

    asked by Melissa
  303. Math(Urgent)

    Compute the maximum product for two positive numbers x and y with the property that the sum of the first plus five times the second is 5000. 1) Indicate the objective equation 2) Indicate the constraint equation So the objective = f(x)=xy and the

    asked by Hannah
  304. statistics

    If I go into an ice cream parlor, and I have the choice of having one of 10 different flavors , with one of 5 different toppings and one of 3 different types of cones, How many times can I come back to this place and get a different ice cream cone

    asked by Anonymous
  305. Math

    The volume of a cylinder is 1256 meters. The height is 13 meters. Diameter is x. What is the diameter?

    asked by MathLover
  306. trigonometry

    an example problem showed the following log tan A/2 = 9.54435 - 10 A= 38 deg 36' 12" Now i want to do the same. log tan A/2 = 9.85551 - 10 A= ?? I don't know how to convert tan into degrees can you help me.

    asked by Anon
  307. psychology

    There are many social and cultural contexts you interact with that strongly influence development. These contexts include people you interact with daily, neighborhood factors, and larger scale social and cultural variables. In order to fully understand how

    asked by april
  308. English

    I learned that handling behavior in a science lab is easy to do as long as the ground rules have been laid out for the students. Is this sentence correct?

    asked by Pete
  309. psychology

    Sona is trying to put together a puzzle that is too difficult for her to complete alone. If the puzzle is within Sona’s zone of proximal development, then she (Points : 1) is likely to complete it if she has assistance. is likely to become frustrated

    asked by april
  310. Phyics

    A ray of light strikes a mirror at an angle of 26 degrees to the normal. What is the angle of reflection? Answer in units of degrees .

    asked by Maria
  311. physics

    A(n) 0.163 kg baseball is thrown with a speed of 9.37 m/s. It is hit straight back at the pitcher with a final speed of 16.7 m/s. What is the magnitude of the impulse de- livered to the ball? Answer in units of kg · m/s.

    asked by Maria
  312. English

    Briefly explain Anne’s relationship with her parents. How is her relationship with her father different from her relationship with her mother? What does each relationship tell you about Anne, her values, and her needs? (the book is the diary of a young

    asked by Roxy
  313. phyics

    A mechanic pushes a(n) 3980 kg car from rest to a speed of v, doing 5107 J of work in the process. During this time, the car moves 29.3m. Neglect friction between car and road. Find the speed v. Answer in units of m/s.

    asked by leslie
  314. Math

    1. 3(1+4)=(3X1)+(3X4) Would this be Distributive Property

    asked by Hayley
  315. MATH

    A rectangular flower is 20 inches long,8 inches wide ,and 6 inches high . True of false. If andy fills the flower pot 2/3 full of soil, the expression 2/3(20 + 8 + 6) could be used to find the about of soil he needed.

    asked by Dani
  316. Science (Chemistry)

    Assuming gasoline is 100% isooctane, with a density of 0.692g/mL, what mass of carbon dioxide is produced by the combustion of 1.2x10^10 gal of gasoline (the approximate annual consumption of gasoline in the U.S.)?

    asked by Jenn
  317. Math(Please, please help)

    Compute the maximum product for two positive numbers x and y with the property that the sum of the first plus five times the second is 5000. 1) Indicate the objective equation 2) Indicate the constraint equation So the objective = f(x)=xy and the

    asked by Hannah
  318. Chemistry

    What unit is barometric pressure measured in?

    asked by Ana
  319. English

    Please HELP correct punctuation & spelling only. THANK YOU! In your letter of July 18, you made a settlement demand of $20,000; accordingly, we have forwarded your settlement demand: the medical reports from Dr. Hammonds and the hospital records to our

    asked by April
  320. English

    Please help Correct punctuation and spelling only. Thanks! We have received medical information from Midvale Clinic, and copies of all the documents we received are enclosed. We received nothing from Dr. Best, and the only items we received from Dr.

    asked by April
  321. english

    Please Help correct punctuation & spelling! Thank you! I tried to call you about the above case, but learned that you were out of town and will not return until Wednesday. You wrote to me on June 1 to ask what authority I had or could get to settle this

    asked by April
  322. Chemistry

    Why is it desirable in the method of back-titration to have a considerable amount(more than 10mL) of acid added in excess?

    asked by E
  323. math quick question

    Hi! Thank you for your help~~ What is the absolute value of (3x - 6)^2 ? (i am trying to use this to find the radius of convergence of a power series by the way)..

    asked by KIKSY
  324. English

    In an entry dated July 15, 1944, Anne writes the following: …in spite of everything I still believe that people are really good at heart. I simply can’t build my hopes on a foundation consisting of confusion, misery, and death. I see the world

    asked by Roxy
  325. chemistry

    How would the % of Fe determined be affected if the unknowns had not been dried and had contained adsorbed water in the titration?

    asked by melissajdfaks
  326. Math

    A storage box measure 24in by 12in by 3in. Find its volume to the nearest cubic meter (1in =2.54cm)

    asked by Anonymous
  327. physics PLEASE HELP!

    The coefficient of kinetic friction between a suitcase and the floor is 0.26. If the suitcase has a mass of 70.0 {kg}, how far can it be pushed across the level floor with 680 {J} of work?

    asked by susan
  328. chem

    The volume of an adult's stomach ranges from about 50 mL when empty to 1 L when full.If its volume is 500 mL and its contents have a pH of 2, how many moles of H+ does it contain?

    asked by Anonymous
  329. english

    Please correct punctuation and spelling errors. Thank you! We have an appointment with Representative Howard at 1:30 p.m. on Tuesday, August 1, in Room 209 at the Capitol in Nashville. Our appointment will precede the General Committee meeting in room 7 of

    asked by April
  330. English

    Punctuation Correction please! As we have discussed, the Spanish Club wants to sponsor a summer study trip to Spain. If our initial surveys are correct, the number of students wishing to participate in the summer study group will exceed 15.

    asked by April
  331. Mathematics

    Hello, what is the absolute value of ((3x-2)^2) ? I know normally, if this was 3x-2, you would do -1

    asked by student3
  332. english

    Punctuation Correction please! At the present time, the Spanish instructor Joseph Diaz has agreed to assume the major responsibility for the final arrangements. Karen McGraw, president of the Instructor’s Council and her husband have agreed to accompany

    asked by April
  333. math

    A rectangle is 4 inches wide by 7 inches long. When the length and width are increased by the same amount, the area is incresed by 26 square inches. What are the dimensions of the new rectangle?

    asked by Gabi
  334. English

    Correct Punctuation, please. As you know, the students will be staying in private homes in the city while studying and touring. Mr. Diaz is preparing a detailed report of the trip plans, and will submit it to you within the next few days.

    asked by April
  335. English

    Correct punctuation, please. The students will be able to receive mail through the American Consul in the city, and any emergency messages should be directed to the office of the American Consul. Since several short excursions are planned to visit the site

    asked by April
  336. phsyics

    Light enters a plate of borosilicate crown glass at an angle of 40.2 degrees  with respect to the nor- mal to the air-glass surface. If the index of refraction of the glass is 1.52, find the angle made by the refracted beam with the normal. Answer in

    asked by leslie
  337. English

    Correct punctuation, please. Attached is a list of guiding principles drawn up by the Spanish Club Council for the students to follow while in Spain. We appreciate your support and we will keep you informed of the progress of our plans for the Spain summer

    asked by April
  338. geog

    what heat engine transfers heat energy from the tropics to the poles?

    asked by anonymous
  339. Calc: Difference quotients

    "Use difference quotients with delta(x)=0.1 and delta(y)=0.1 to estimate fx(1,3) and fy(1,3) where f(x,y)=e^(-x)sin(y)." I don't know how to solve this problem. Could someone walk me through it? Thank you so much!

    asked by Brittany
  340. Math

    A pipe has an outside diameter of 1.25 inches and an inside diameter of 0.75 inches. If Kelly hacksaws the pipe in two, what fraction of the pipe cross sectional area is sawn when the blade breaks through to the inside?

    asked by Anonymus
  341. Gradient vectors

    "Find the gradient of the given function: z = xe^(y). Assume the variables are restricted to a domain on which the function is defined." Thanks for the help!

    asked by Anonymous
  342. Finding gradient at a given point

    "Find the gradient f(x,y)= x^(2)*y + 7xy^(3) at (1,2)." Thank you!

    asked by Anonymous
  343. Directional derivative

    "Find the directional derivative fu(1,2) for the function f with u = (3i-4j)/5 for f(x,y)= x^(2) - y^(2)." Thank you!

    asked by Anonymous
  344. Calc

    The question that I'm stuck on is this: "Let f(x,y)= x^(2)*ln(y). Find the average rage of change of f as you go from (3,1) to (1,2) and find the instantaneous rate of change of f as you leave the point (3,1) toward (2,1)." Any help would be appreciated.

    asked by Brittany
  345. Calc

    The directional derivative of z = f(x,y) at (2,1) in the direction toward the point (1,3) is -2/sqrt(5), and the directional derivative in the direction toward the point (5,5) is 1. Compute dz/dx and dz/dy at (2,1). I have no idea how to solve this

    asked by Dani
  346. math

    if x=f and f is 13 what is t

    asked by person
  347. math

    Solve the following system of linear equations by graphing. (If the system has no solution, enter NONE for each answer. If the system is dependent, enter INFINITELY MANY for each answer.) 7x+2y=0 2x-7y=0 x = y =

    asked by jannette
  348. Calc

    The temperature at any point in the plane is given by function f(x,y) = 100/(x^(2)+y^(2)+1). Find a direction at the point (3,2) in which the temperature does not increase or decrease. Help, please? Thank you.

    asked by Dani
  349. Math

    If a person was locked in a perfectly insulated room 8ft by 8ft by 10ft, how long would it take the room temperature to increase from 75 degree Farenheit to 100 degree Farenheit? The density of air is 1.2 Kg/Cubic meter and 1 watt sec is its specific heat.

    asked by Anonymus
  350. algebra 2

    Factor completely 6r^2+13rd+6b^2. Thank you.

    asked by Esther
  351. Math

    This problem deals with TRADE & CASH DISCOUNTS. PLEASE HELP solving some questions. Here is some information in regards to the questions. THANK YOU! Misuse and abuse of trade discounts infringe on fair trade laws and can cost companies stiff fines and

    asked by April
  352. calculus

    consider a point on a circle x2+y2=1.At what rate Y is changing with respect to X when the point is at X=1/2....

    asked by Anonymous
  353. Reading

    The Great Gatsby Movie Discussion Questions? Compare and contrast Gatsby's social class with that of Tom and Daisy Buchanan. How does geography contribute to the definintion of social class in The Great Gatsby? What part of his past is Gatsby trying to

    asked by Erin
  354. us history

    what is your opinion on if the united states should have became isolated after the cold war to maintain peace

    asked by mary
  355. equation

    For the following linear inequalities draw the feasibile region i: x _>1 ii: x+y _

    asked by winning
  356. Chemistry

    Cr(OH)3Cr+3+3OH- 1. which direction will equilibrium change if CrCl3 is added, why? 2. which direction will equilibrium change if HCL is added, why?

    asked by kappie
  357. equation

    For the following linear inequalities draw the feasibile region i: x _>1 ii: x+y _

    asked by winning
  358. Math

    Solving quadratic equations by graphing? 3. x2-4x + 6 = 0 4. x2-4x-1=0 5. 4x2-12x + 3 = 0 6. x2-2x-4=0

    asked by Erin
  359. linear equation

    For the following linear inequalities draw the feasibile region i: x _>1 ii: x+y _

    asked by winning
  360. Chemistry

    Cr(OH)3Cr+3+3OH which direction will equilibrium change if CrCl3 is added and why. which direction will it change if HCL is added and why?

    asked by apple
  361. Math

    Write a mulplication problem. It's a square where 50 little squares are shaded, 20 are not shaded and 30 are double shaded

    asked by please help
  362. Chemistry

    Consider the reaction: 2CO2(g)=2CO(g) + O2(g). A reaction mixture in a 5.0 L flask at a certain temperature. At equilibrium there are 85 g of CO2(g), 1.20 g of CO, and 0.688 g of O2(g). Calculate Kc.

    asked by Ariel
  363. algebra 2

    Factor completely 6r^2+13rd+6d^2. I'm sorry, you are absolutely correct, there was a typo it was>>> (6b), the correct is 6d. thank you for spotting that mistake.

    asked by Esther
  364. Chemistry

    Consider the reaction: 2CO2(g)=2CO(g) + O2(g). A reaction mixture in a 5.0 L flask at a certain temperature. At equilibrium there are 85 g of CO2(g), 1.20 g of CO, and 0.688 g of O2(g). Calculate Kc.

    asked by Ariel
  365. Chemistry

    Consider the reaction: 2CO2(g)=2CO(g) + O2(g). A reaction mixture in a 5.0 L flask at a certain temperature. At equilibrium there are 85 g of CO2(g), 1.20 g of CO, and 0.688 g of O2(g). Calculate Kc.

    asked by Ariel
  366. algebra 2

    Factor completely 6r^2+13rd+6d^2. I'm sorry, you are absolutely correct, there was a typo it was>>> (6b), the correct is 6d. thank you for spotting that mistake.

    asked by Esther
  367. math

    Sara has gone to work for 60 days. On 39 of those days she arrived at work before 8:30A.M. On the rest of the days she arrived after 8:30A.M What is the experimental probability that she will arrive at work after 8:30A.M the next day she goes to work

    asked by Trina
  368. MATH: Cash discounts / Trade discounts

    This problem deals with TRADE & CASH DISCOUNTS. PLEASE HELP solving some questions. Here is some information in regards to the questions. THANK YOU! Misuse and abuse of trade discounts infringe on fair trade laws and can cost companies stiff fines and

    asked by April