Questions Asked on
February 26, 2013

  1. calculus 1

    A kite 100 ft above the ground moves horizontally at a speed of 10 ft/s. At what rate is the angle (in radians) between the string and the horizontal decreasing when 200 ft of string have been let out?

    asked by heather
  2. Chemistry

    A certain indicator, HA, has a Ka value of 1.3 × 10-6. The protonated form of the indicator is blue and the ionized form is red. What is the pKa of the indicator? What is the color of this indicator in a solution with pH = 8? Blue, red, or purple?

    asked by Nancy
  3. math

    Generate the first five terms in the sequence using the explicit formula. cn= 12n – 11 (1 point)

    asked by paige
  4. math

    What is the third quartile, Q3, of the following distribution? 10, 25, 18, 31, 16, 27, 5, 13, 32, 24, 15, 21, 18, 18, 24, 4, 8, 11, 11, 23

    asked by re
  5. Physics

    A spherical concave mirror has a raduis of curvature of 6.0 cm. At what distance from the mirror should a 6.0 cm object be placed to obtain an image that is 48 cm tall?

    asked by Aa
  6. physic

    a resistor has a voltage of 6.65 V and a current of 4.45 A. it is placed in a calorimeter containing 200g of water at 24 degree Celsius. the calorimeter is aluminum (specific heat= 0.220 cal/g-Celsius), and its mass is 60g. the heat capacity of the

    asked by julie
  7. math

    Money is invested in a savings account at 3.4% simple interest. After 1 year, there is $1695.76 in the account. How much was originally invested?

    asked by Cathy
  8. Algabra 1

    Need help stuck on question. Find the range of f(x)=3g-5 for the domain (-1.5,2,4) A- (-8,10,-1,-1) B- (-9.5,1,7) C- (8,10,1,1) or D- (9.5,-1,-7)

    asked by nick
  9. Math

    The elephants at the zoo are fed 1/2 barrel of corn each day. The buffalo are fed 7/10 as much corn as the elephants. How many barrels of corn are the buffalo fed each day?

    asked by Kim
  10. PHYSICS 1 ..'''''''''''''''''''''''' helllpppppppp

    A girl of mass (Mg) is standing on a plank of mass (Mp). Both are originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity (vgp) to the right relative to the plank.

    asked by Rrjey
  11. math

    How long is a rectangular strip of land with a width of 5/4 km and an area of 3/4 square km ?

    asked by john
  12. Chemistry

    Comment on the relative acidities of h3po4 and the h2po4 ion? I don't understand what this question is asking? Would H3PO4 is a strong acid and will completely dissociate into ions in aqueous solution suffice?

    asked by Todd
  13. AP Chem

    For the following equilibrium system, which of the following changes will form more CaCO3? CO2(g) + Ca(OH)2(s) CaCO3(s) + H2O(l) deltaH(rxn) = -113 kJ My choices are: a) Decrease temperature at a constant pressure (no phase change) B) Increase volume at a

    asked by Lisa
  14. Math

    Javia ran 8 laps around a track to run a total of 1 mile on Monday. How many laps will she need to run on Tuesday to run 3/8 of a mile?

    asked by Kim
  15. chemistry 1B

    1-propanol (P1° = 20.9 Torr at 25 °C) and 2-propanol (P2° = 45.2 Torr at 25 °C) form ideal solutions in all proportions. Let x1 and x2 represent the mole fractions of 1-propanol and 2-propanol in a liquid mixture, respectively, and y1 and y2 represent

    asked by Anonymous
  16. physics

    A canon mounted on a pirate ship fires a cannonball at 125 m/s horizontally, at a height of 17.5m above the ocean surface. Ignore air resistance. (a) How much time elapses until it splashes into the water? (b) How far from the ship does it land?

    asked by Susan
  17. math

    Trent earned $28,500 last year. He paid $8,265 for rent. What percent of his earnings did Trent pay for rent

    asked by joseph
  18. Geometry

    1. Find the diameter of a circle with a circumference of 50 mm. Round your answer to the nearest tenth. a) 16.0 mm b) 26.4 mm c) 8.4 mm d) 33.5 mm 2. Find the area of the circle with the given radius or diameter. Round your answer to the nearest tenth.

    asked by Sandy
  19. Spanish: Please check answers

    Please check my answers. The answers are at thebottom. 11. Choose the most logical sentence completion. Yo _______ el libro a la biblioteca. vuelvo devuelvo puedo duermo 12. Choose the most logical sentence completion. Ellos __________ en el café. cuestan

    asked by James
  20. Chemistry

    The triprotic acid H3A has ionization constants of Ka1 = 6.8× 10–3, Ka2 = 8.1× 10–9, and Ka3 = 5.0× 10–12. Calculate the following values for a 0.0760 M solution of NaH2A [H+] = ? [H2A-]/[H3A]= ? Calculate the following values for a 0.0760 M

    asked by Nancy
  21. Math

    a group of 100 students took a quiz. Their average score was 76 points. If the average score for boys was 80 points and the average score for girls was 70 points, how many girls participated in the quiz

    asked by Sam
  22. Physics

    A long jumper leaves the ground with an initial velocity of 12 m/s at an angle of 28-degrees above the horizontal. Determine the time of flight, the horizontal distance, and the peak height of the long-jumper.

    asked by Dan
  23. Chemistry

    What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA–, A2–) at pH 7.22?

    asked by Nancy
  24. Algebra

    the length of a rectangular piece of land is 40 cm more than two times its width. the perimeter is 680 cm. Find its dimensions

    asked by Jenny
  25. Physics true false

    true false The speed of a particle is always positive. True False The average speed of a particle is equal to the magnitude of its average velocity. True False The acceleration of a particle can be non-zero when its speed is constant. True False When the

    asked by Robin
  26. science

    7750 Joules of energy is added to a 325 grams stone at 24.0 degrees centigrade. The temperature increases by 75.0 degrees centigrade. What is the specific heat of the stone?

    asked by basil
  27. english

    What is a personification expression for hands on a clock?

    asked by josh
  28. Chemistry

    In the formula 2C4H10+13O2=10H2O+8CO2 whats the mass of butane needed to produce 79.7g of carbon dioxide.

    asked by Anonymous
  29. Physics--PLZ HELP!

    When the switch is closed in a circuit, the wire between the poles of the horseshoe magnet deflects upward. From this you can conclude that the left end of the magnet is ---- -- -- -- -- -- -- A) a magnetic dipole. B) not contributing to the wire's

    asked by Liz
  30. math

    Triangle GHI is an isosceles triangle. H is the vertex. If the measure of H is 73 degrees what is the measure of G? A.73 B.17 C.34 D.104 A)73 degrees?

    asked by Lance
  31. MATH

    a rule of thumb used by car dealers is that the trade in value of a car decreases by 20% of its value each year. suppose the initial value of your car is $23,500. write an equation expressing the trade in value of your car as a function of the number of

    asked by Anonymous
  32. math

    Write the decimal for each of the following: 1.) two and fifteen hundredths = 2.15 2.) sixty-six hundredths = 0.66 3.) four and eight hundredths = 4.08. 4.) one and thirty five hundredths. =1.35 5.)ninety nine hundreths = 0.99 6.) seven and twenty

    asked by thea
  33. statistics

    Suppose a random sample of 80 measurements is selected from a population with a mean of 65 and a variance of 300. Select the pair that is the mean and standard error of x.

    asked by veronica
  34. shbhvghs

    What is the direction of the total electric field at any point on the axis where

    asked by ravi
  35. math

    1.) $850 plus 8% on sales of $8,000 2.) $1,200 plus 4.5% on sales of $6,500 3.) You purchase 9 1/2 yards of fabric at $11.00 per yard. If there is a 7% salesb tax, what is the total cost of the fabric

    asked by Sabrina
  36. math

    6. Solve by factoring. m² + 8m + 7 = 0 (1 point)8, 7 –7, 1 *–7, –1 7, 1 7. Solve by factoring. n² + 2n – 24 = 0 (1 point)–12, 2 –2, 12 *–6, 4 –4, 6 Please Help

    asked by James
  37. physics

    an infinite ladder network of resistance is constructed with 1 ohm and 2 ohm resistances .calculate equivalent resistance between points a and b

    asked by maneet
  38. Lang. Arts

    4. Choose the sentence in which the comma helps make the meaning clear. A.If you call, them the dogs will come back. B.If you call them, the dogs will come back. C.If you call them the dogs, will come back. D.If you call them the dogs will come, back I

    asked by Cassie
  39. Physics Power

    1.) How much energy does a 60 W light bulb consume in 1 hour? 2.) Beth pulled her brother (m=85 kg) in a 10 kg sled with a constant force of 95 N for 100 m. a) How much work did Beth do in moving her brother? b) How much power did she expend if it took her

    asked by Isis
  40. poetry

    In this unit, you read William Wordsworth’s poems “Lines Composed a Few Miles Above Tintern Abbey,” “The World is Too Much with Us,” and “I Wandered Lonely as a Cloud.” How are these poems representative of the Romantic Period?

    asked by Whitney
  41. parallelograms

    what is the area of parallelogram lmno

    asked by briana
  42. geometry

    A triangle has side lengths 24, 32, and 42. Is it a right triangle? Explain

    asked by georgetooraw
  43. fractions

    Adam 3/12,1/6,1/3 Adam used the three fractions to make a circle graph and colored each a different color. What fraction of the graph is not colored?explain your answer.Can anyone help i need to explain to my 4 grader.

    asked by ttuuffyy
  44. Algebra ASAP

    Elimination ( show work please) 6x+5y=39 3x+5y=27

    asked by Stephanie
  45. Physics

    At a certain instant, a ball is thrown downward with a velocity of 8.0 m/s from a height of 40 m. At the same instant, another ball is thrown upward from ground level directly in line with the first ball with a velocity of 12 m/s. Find (a) the time when

    asked by Dan
  46. Algebra- please help me!

    4a^2+9b^2+25c^2-12ab+20ac-30bc divided by 2a-3b+5c.

    asked by Jeconiah
  47. Chemistry

    In the reaction 2H2O2(aq)-->2H2O2 + O2 (g), There is intially 0.865 M H2O2. After 10.0 minutes, the molarity of H2O2 changes to 0.792 M. What is the rate of reaction in terms of H2O2?

    asked by Crystal
  48. Chemistry

    Are the following electrolytes or non-electrolytes? 1) CH3CH2CH2OH 2) Mg(OH)2 3) H3CO4CH3

    asked by Rena
  49. Physics

    A competitor is aiming to complete a 1500m wheel-chair race in less than 4 min. After moving at a constant speed for exactly 3.5 min, there were still 240m to go. What must his acceleration be for the remaining distance if he were to finish the race on

    asked by Emilee
  50. Analytical Chemistry

    What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA–, A2–) at pH 7.05? Not sure how to find k1 and k2 needed for the fraction formulas...please help :(

    asked by Sam
  51. chemistry

    identify the reducing and the oxidizing agent for each reaction: a) 2na + br2 = 2nabr b) h2 + cl2 = 2hcl c) 2li + f2 = 2lif d) s + cl2 = scl2 e) n2 + 2o2 = 2no2 f) mg + cu(no3)2 = mg(no3)2 + cu

    asked by mfsl123
  52. Science

    Can you tell me the Main Idea(s)? There’s an old saying that oil and water don’t mix. But sometimes they do — especially when a chemical called a surfactant brings the two together. Once blended, oil and water become tough to pull apart. Unless, that

    asked by Anonymous
  53. Math

    A wheel has a 32 inch diameter. The speed of a point on its rim is 44 ft/sec. What is its angular speed?

    asked by Sarah
  54. law

    looking for an article relating to civil law, The article can no be older than December 2010 and it has to relate to the contemporary law and justice. Any suggestions?

    asked by Gabby
  55. Chemistry

    2Al(s)+3Cl2 = 2AlCl3 Limiting Reactant is Cl with 0.329mol. What is the maximum mass of aluminum chloride that can be formed when reacting 30.0g of aluminum with 35.0g of chlorine?

    asked by Veronica
  56. algebra

    The lines x=4y−a and y=4x−b intersect at the point (1,2). What is a+b?

    asked by what is the answer
  57. Math-geometry

    A regular polygon with all sides that are congruent and all angles that are congruent. Thus, the regular triangles are equilateral triangles, and the regular quadrilaterals are squares. All equilateral triangles are similar to one another and all squares

    asked by PLEASE HELP
  58. World History- (Ms. Sue)

    In what ways was racism common in both the North and the South?

    asked by Victoria
  59. science

    what is the structural formula for a) 3,3,4-trimethyloctane B) 2-methyl-1-pentene

    asked by bob
  60. asap math

    Divide 70 by 9 and write the answer as a mixed number

    asked by noahc
  61. Chemistry

    In a constant-pressure calorimeter, 60.0 mL of 0.320 M Ba(OH)2 was added to 60.0 mL of 0.640 M HCl. The reaction caused the temperature of the solution to rise from 23.24 °C to 27.60 °C. If the solution has the same density and specific heat as water,

    asked by Blaire
  62. pysics

    A home run just clears a fence 105m from home plate. The fence is 4.00m higher than the height at which the batter struck the ball, and the ball left the bat at a 31.0 degree angle above the horizontal. At what speed did the ball leave the bat?

    asked by Susan
  63. math Please HElp

    The minute hand on a watch is 7 mm long and the hour hand is 4 mm long. How fast is the distance between the tips of the hands changing at one o'clock? (Round your answer to one decimal place.)

    asked by monic
  64. Biology

    When cells increase in size, the surface area to volume ratio decreases. But which surface area to volume ratio is better to the cell as well as to the organism? The larger or smaller ratio?

    asked by Mengistu
  65. chm

    Which of the following is a covalent compound composed of nonpolar covalent bonds? Answer >>H2 H2O CF4 CH4 NaF

    asked by jj
  66. Math-geometry

    A regular polygon with all sides that are congruent and all angles that are congruent. Thus, the regular triangles are equilateral triangles, and the regular quadrilaterals are squares. All equilateral triangles are similar to one another and all squares

    asked by Urgent!!
  67. chemistry

    why is HS- a stronger BL base compared to HSO4 In a series of oxybases with the same central atom, the base with more O atoms is stronger. In a series of oxybases with the same central atom, the base with less O atoms is stronger. Since H2SO4 is one of the

    asked by Hannah
  68. Physics

    Train A starts at 4 miles South of a bridge and heads North at a constant speed of 30 miles per hour. Train B starts 6 miles North of the bridge. a. What velocity must Train B have so that the two trains cross the bridge at the same time? b. If Train B

    asked by Dan
  69. math

    f(x)=2x2−146x+c has 2 roots that are positive prime numbers. What is c?

    asked by Hardwell
  70. geom

    fill blanks give values of cin terms of pi if r=7m then d=?and c=?

    asked by ca
  71. chemistry

    Calculate the theoretical yield (g) of precipitate formed when 10.0 mL of 0.50 M magnesium nitrate is added to 5.0 mL of 0.50 M potassium phosphate? [You must first write the balanced chemical equation.] Which reactant is present in excess?

    asked by Joe
  72. math

    how do you convert one half into a decimal?

    asked by serenity
  73. math

    Given P=RT/V, make T the subject of the formula

    asked by annecia
  74. physics

    motor A lift a steel bar 5000N upward at a constant 2m/s. motor B lift 4000N steel bar upward at a constant 3m/s. which motor is supplying more power?

    asked by Anonymous
  75. Maths

    A straight river flows at a speed of 20km/h. A boater starts at the south shore and heads in ths direction of 70degrees from the shore. The boat has a speed of 20km/h in still water. Find the true speed and direction of the boat.

    asked by Anonymous
  76. differential equation urgent !

    using method of undetermined coefficients d^2y/dx^2 -5 dy/dx+6y=xe^x

    asked by deq
  77. Spanish 1

    Complete the sentences with the correct form of ir. todos Los Dias, yo ____ a la escuela

    asked by Jade
  78. Finance

    Your board of directors is thinking of taking out a loan of $500,000 for the corporporation. You have to pay $5,500 per month and $50,000 after 10 years. What annual Rate of Return would you hve to achieve on investments to make this a profitable venture?

    asked by mary
  79. Physics

    A small lead ball, attached to a 1.50-m rope, is being whirled in a circle that lies in the vertical plane. The ball is whirled at a constant rate of three revolutions per second and is released on the upward part of the circular motion when it is 0.75 m

    asked by Randy
  80. Physics

    One of the most powerful cranes in the world, operating in Switzerland, can slowly raise a load of 6000 tonne to a height of 12 m. (1 tonne = 1000 kg) The acceleration of gravity is 9.81 m/s2 . How much work is done by the crane? Answer in units of MJ I

    asked by Danny
  81. Broadcast news

    we had to write a lead on this news, answering what's the what, whats news, and since its broadcasting we had to be it simple and conversational, as if we were reading it. story: The Bush Administration recently proposed eliminating 20 National Weather

    asked by Blaze
  82. Science ASAP

    Can you tell me the Main Idea(s)? There’s an old saying that oil and water don’t mix. But sometimes they do — especially when a chemical called a surfactant brings the two together. Once blended, oil and water become tough to pull apart. Unless, that

    asked by Anonymous
  83. Analytical Chemistry

    You prepare a solution from 10.0 mL of 0.100 M MOPS buffer (3-morpholinopropane-1-sulfonic acid) and 10.0 mL of 0.086 M NaOH. Next, you add 1.00 mL of 8.87 × 10-4 M lidocaine to this mixture Denoting lidocaine as L, calculate the fraction of lidocaine

    asked by Sam
  84. Physics

    The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure.

    asked by Arif khan
  85. Physics

    The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure.

    asked by Arif khan
  86. Algebra

    The owner of the studio replaced the tiles last year. The tiles cost $15 for a set of 8 and $2 for each additional tile. What is the monthly increase the owner charged each of her 34 students over a 6-month period to cover the cost of replacing the tiles?

    asked by Aimee
  87. help college algebra

    given the following piecewise function f(x) = -x+1 for x

    asked by zachary
  88. Math

    A horse on a merry-go-round is 20 ft from the center and travels at 10 mph. What is its angular speed?

    asked by Sarah
  89. Physics

    Name the fundamental forces of nature.

    asked by Arif khan
  90. math help

    Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft. Use 3.14 for ð and round to the nearest tenth

    asked by Abbey
  91. World History- (Ms. Sue)

    What were the two ways that the North and the South differed by the mid-1800's? My answer: The North had a rapidly growing economy with a large and rapidly growing urban population and no slavery north of the border states. The South was dominated by a

    asked by Victoria
  92. Chemistry

    A block of aluminum with a volume of 98.5 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5 °C, what is its final temperature? (density of aluminum = 2.70 g/cm3) I do not understand how to get the answer

    asked by Mon
  93. Vocabulary

    I need help with writing sentences using my vocabularywords

    asked by David
  94. maths

    integrate sqrt2/1-3x

    asked by Anonymous
  95. elecTRICITY

    A 9V battery has an electric potential difference of 9V between the positive and negative terminals. How much kinetic energy in J would an electron gain if it moved from the negative terminal to the positive one?

    asked by Anonymous 100
  96. Psychology - Social Problems

    Please check my answers. 1. When considering marital separation and divorce as a social problem, an effective approach might be to: __x_a. develop counseling options for couples in crisis. ____b. focus on problems with the institution of marriage itself.

    asked by Suzy
  97. phYSICS!!!

    Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the

    asked by Anonymous 100
  98. Algebra

    The floor of the studio is covered with 615 square tiles that measure 2 feet by 2 feet. The owner of the studio replaced the tiles last year. The tiles cost $15 for a set of 8 and $2 for each additional tile. What is the monthly increase the owner charged

    asked by Aimee
  99. geometry

    prove that The sum of the angles in any triangle is 180 degrees is true in Euclidian geometry.

    asked by denise
  100. math

    the 2 consecutive multiples of 6 up to 116

    asked by tangi
  101. Chemistry

    What is the maximum mass of aluminum chloride that can be formed when reacting 30.0g of aluminum with 35.0g of chlorine

    asked by Veronica
  102. geoMETRY!

    ABC is an acute angle triangle with points D and E on BC and AC, respectively such that BE and AD are altitudes. AD and BE intersect at H. If ∠BCA=39∘ and ∠EBA=2∠DAB, what is the measure of ∠ABC (in degrees)?

    asked by BATMAN
  103. economic and management science

    discuss the development of money

    asked by lindokuhle
  104. Spanish: PLEASE HELP

    Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." *A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar *B.) comer C.)

    asked by James
  105. algebra

    How many pairs of integers (not necessarily positive) are there such that both a2+6b2 and b2+6a2 are both squares?

    asked by robin!
  106. algebra!

    The lines x=4y−a and y=4x−b intersect at the point (1,2). What is a+b?

    asked by robin!
  107. Chemistry

    Identify the true statement about Lewis structures. Select all the correct answers. 1. Hydrogen is usually surrounded by 4 electrons in a valid Lewis structure. 2. A single bond in a Lewis structure represents 2 electrons. 3. A double bond in a Lewis

    asked by will.i.am
  108. physics

    IF A 0.5 Kg baseball(at rest) is hit by a bat with a force of 200.0 N what is the magnitude of the baseball just as it is leaving the bat?

    asked by RICHARD
  109. Math

    The perimeter of a quilt had to be 34 feet because he only had that much binding. If he wanted it to be 8ft long what would its area be?

    asked by Trent
  110. algebra!

    The number 1003003001 is the product of N (not necessarily distinct) primes. What is the value of N?

    asked by what is the answer
  111. LAW

    looking for an article relating to civil law, The article can no be older than December 2010 and it has to relate to the contemporary law and justice. Any suggestions?

    asked by Gabby
  112. world history

    What is the answers to study guide chapter 12 part 3?

    asked by juju
  113. Chemistry

    A block of aluminum with a volume of 98.5 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5 °C, what is its final temperature? (density of aluminum = 2.70 g/cm3) I do not understand how to get the answer

    asked by Mon
  114. o.chem

    how would doubling the concentration of the nucleophile affect the rate of an sn2 reaction?

    asked by sara
  115. chemistry

    what is the structure of H2P2O6?

    asked by nitesh solanki
  116. science

    Expain why deepa sea fishes are not crushed by the pressure of all of the water above them. I think maybe its because their density or mass is higher? Am I right?

    asked by Dave
  117. Math

    The wheels of a bicycle have a 24 inch diameter. When the bike is being ridden so that the wheels make 12 rpm, how far will the bike travel in one minute?

    asked by Kay
  118. Math

    Triangle ABC is an isosceles triangle If the measure of B is 37 degrees what is the measure of C? A.37 B.53 C.106 D.143 I think it's A or C?

    asked by Lance
  119. math

    The blackberry cobbler recipe makes 8 equal servings. Nina, Jack, and Cameron each ate 1/4 of the servings. How many servings of cobbler were left over?

    asked by Bianca
  120. Physics

    A current of 4.6 A is measured through a 7.8 ohms resistor for 1.75 minutes. How much heat is generated by the resistor?

    asked by Brittany
  121. Engineering Economy

    What is the future worth of $1,000 in month 1, $1,040 in month 2, and amounts increasing by $40 per month through month 12, at the end of year 2 if the interest rate is 23.7631528% per year, compounded continuously?

    asked by ANdy
  122. Math

    Susan was awake for 2/3 of an entire day. If she spent 3/7 of her time awake at work, what fraction of the day was she at work?

    asked by Kim
  123. Broadcast/english

    we had to write story in correct broadcast form in correct broadcast form, and include the soundbite. Based on this false information information: Kalamazoo, Michigan, is experiencing a severe snowfall which began yesterday. Past record snowfalls in

    asked by Blaze
  124. Physics

    A current of 4.6 A is measured through a 7.8 ohms resistor for 1.75 minutes. How much heat is generated by the resistor?

    asked by Brittany
  125. Math

    Cathy made 25 cupcakes for the friends at her party. If only 4/5 of her friends showed up, how many cupcakes does she have left?

    asked by Kim
  126. math

    1/8 inch= 5 mile, then 1 inch = how many miles

    asked by Len
  127. Age Probs

    Lisa is 16 years younger than Andy. In 6 year, the sum of their ages id 42. How old is Lisa now?

    asked by Daniella
  128. Algebra

    The floor of a dance studio is covered with 615 tiles. The owner of the studio replaced the tiles last year. The tiles cost $15 for a set of 8 and $2 for each additional tile. What is the monthly increase the owner charged each of her 34 students over a

    asked by David
  129. math

    what is 4x+2=26,then 4x8=

    asked by matt
  130. Calc

    find the derivative of y =(x+3)^3 / sqrt(x^2 -1) using logarithmic differentation.

    asked by Lost One
  131. English 8R - HELP!

    How did Active Reading lend itself to the ELA Short Response Questions?

    asked by Laruen
  132. Algebra

    The floor of a dance studio is covered with 435 tiles. The owner of the studio replaced the tiles last year. The tiles cost $15 for a set of 8 and $2 for each additional tile. What is the monthly increase the owner charged each of her 34 students over a

    asked by Aimee
  133. Canadian Law

    1)How has battered-woman syndrome been used in criminal court cases in recent years? 2)Compare the Lavallee and Malott cases. How are they similar and how are they different? 3)Why do you think many abused woman drop the charges against their abusive

    asked by Kristein
  134. physics.... please help

    A ball is dropped from a height of 5.67 m. If the ball rebounds with a speed of 4.22 m/s, what is the coefficient of restitution? a. .40 b. .74 c. .56 d. 1.23 I've ruled d out because it is greater than 1.

    asked by Kaci
  135. science

    Expain why deep sea fishes are not crushed by the pressure of all of the water above them. I think maybe its because their density or mass is higher? Am I right?

    asked by Dave
  136. chemistry

    Commodity prices of NaCl and urea are about $0.033/lb for NaCl (as rock salt) and about $0.10/lb for urea. Calculate the cost of treating 1000 lb of ice on a surface to produce a solution that melts at -3.9 degrees Celsius with each chemical. I know you

    asked by K
  137. math

    Maisie is writing a report about kangaroos. The report must be two full pages. If there are twenty lines on each page and each line has about 20 words, about how many words long does Maisieʼs report need to be?

    asked by Anonymous
  138. MATH

    HOW DO YOU CALCULATE THIS? 5:05 PM SUBTRACT 1.9 HOURS?

    asked by Anonymous
  139. History

    Why did the Second Great Awakening lead to reform movements?

    asked by Darcy
  140. Physics

    A horse on a merry-go-round is 20 ft from the center and travels at 10 mph. What is its angular speed?

    asked by Kay
  141. Chemistry

    what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

    asked by Chloe
  142. Chemistry

    what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

    asked by Chloe
  143. algebra

    The cost equation for screeners (t-shirt shop)was y=50+7x and the cost equation for teasers (t-shirt shop) was y=78+5x write one equation that will tell you the number of t-shirts when the cost is the same

    asked by Giovanna
  144. Chemistry

    what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

    asked by Chloe
  145. Chemistry

    what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

    asked by Chloe
  146. English

    1. The defenders of the Alamo put up such a (burly dogged) resistance that the enemy had a hard time capturing it dogged 2.To avoid a lot of unwanted attention the famous rock star registered in the hotel under a(n) (rummage alias) alias 3.An art historian

    asked by Jerald
  147. Physics

    I'm trying to rank the maximum temperatures of water at 20 degrees Celsius after adding in heated copper cylinders. The first case is 1 cylinder at 22.5 degrees Celsius. Second is two cylinders at 25 degrees Celsius. Third is 3 cylinders at 25 degrees

    asked by Snowy
  148. math

    what should you do if at first you don't succeed? its a riddle and the letters are y,t,o,r,h,p,s

    asked by jacob
  149. math

    write the simplest form 2.30

    asked by Blake
  150. physical

    what are the limitations on practical interstellar travel for both manned and unmanned craft and what are some proposed ways to deal with them in the future?

    asked by sasha
  151. Math

    if a person deposits $304 per year for 13 years and makes $4275, how much interest did he make per year?

    asked by Jill
  152. math.chapter 8.

    what does do not replace it mean

    asked by freddy mejia
  153. Eng1511

    Summarize the sequence of events leading to the write's proposal to mimmy.highlight the details of the couple's journey to finding love

    asked by Nqobile
  154. language arts

    I want a compostion on the moon

    asked by kelly
  155. calculus

    what is the limit of (9x/(9x+5))^(6x) as x approaches infinity?

    asked by brad
  156. English

    Word box: alias amble burly distort dogged dumbfounded extinct fossil grit inevitable ingrained meteoric parody prevail rend replenish rummage skimp sleuth vandalism 2.We were nothing less than ____ when we saw the immense damage that the hurricane had

    asked by Jerald
  157. calculus

    evaluate the following limit... ((1-x)/((1/e)-(e^-x))) as x approaches one

    asked by brad
  158. English

    Whats the nouns and verbs in this sentences ? Seek his will in all you do and he will direct your paths

    asked by Anonymous
  159. calculus

    Find the value for W when the limit as x approaches 8 of ((2x^2)-7x + W)/(x-8) = 25

    asked by brad
  160. hurry past bedtime

    As a mixed number what is 70÷9

    asked by noahc
  161. Math

    The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare

    asked by Selena (Please Help)
  162. physics

    You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 1/2 A of current through the light bulb and 5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 2.5 W. Assuming any resistors

    asked by jamie
  163. Algebra 2

    a.) the number of terms b.) the first term c.) the last term d.) evaluate the sum 5 E (3+n) n=1 8 E 2n/3 n=1 I don't know what the symbol is for the equation but it looks like an "E"

    asked by natasha
  164. mat/116

    What would be the value of expressing something like the national debt in scientific notation? What information would be lost in such a usage? Is that important? Explain why or why not

    asked by meka a
  165. algebra

    If you bought 24 cards for $50, one card is $1 each and he other card is $5. Write an equation and solve.

    asked by mariah
  166. math

    why does lxw=a work

    asked by sam
  167. Calculus Help

    Evaluate the indefinite integral. ∫4dx/(xln(x))

    asked by Anonymous
  168. Math

    Pls help me find the volume of rectangular prism: Width 23cm Height 8cm Length 14.2

    asked by Faisal
  169. College physics

    According to test performed by the manufactures, an automobile with an initial speed of 75 km/h has a stopping distance of 25 m on a level road. assuming that no skidding occurs during breaking, what is the value of μ , between the wheels and the road

    asked by Sneakatone
  170. math

    A bakery can sell muffins for $1 each. If it costs the bakery $5 to make 20 muffins, what percent of the money?

    asked by Anonymous
  171. math

    Lane French had a bad credit rating and went to a local cash center. He took out a $100 loan payable in two weeks at $115 (In other words, in two weeks he paid back a total of $115). What is the percent of interest paid on the loan? Do not round

    asked by Iliyan
  172. pre-calculus

    the foci of an ellipse are (0,2) (0,-2) and the eccentricity is 1/2. determine the equation of the ellipse. write your answer in standard form.

    asked by yumi
  173. English

    16.Isnt it foolish to think that just because of his (meteoric burly) physique he has no interest in art or music? burly 17.We scorn all those who would deliberately bend the truth and (distort amble) history in order to suit the political needs of their

    asked by Jerald
  174. Chemistry

    calculate the energy in joules lost when 70.0 grams of water cools from 86.4 celsius to 7.1 celsius

    asked by anon
  175. English

    Word box: alias amble burly distort dogged dumbfounded extinct fossil grit inevitable ingrained meteoric parody prevail rend replenish rummage skimp sleuth vandalism 1.There is an old saying that nothing is really ____ except death and taxes inevitable

    asked by Jerald
  176. fractions

    Adam used the three fractions to make a circle graph and colored each a different color. What fraction of the graph is not colored?explain your answer.Can anyone help i need to explain to my 4 grader.

    asked by ttuuffyy
  177. English

    Which word has the same beginning sound as special? sunny swept sprout speed speed

    asked by Hayden
  178. Statistics

    A simple random sample of 120 SAT scores ahs a mean of 1540. Assume that SAT scores have a population standard deviation of 333. a) Construct a 95% conf. interval estimate of the mean SAT score. b) Is a 99% conf. interval estimate of the mean SAT score

    asked by Sandy
  179. college physics

    You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 0.75 A of current through the light bulb and 7.5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 5.625 W. Assuming any

    asked by michelle
  180. AP Calculus BC

    A curtate cycloid is defined by the equations x = 2t - sin t and y = t - cos t. If I walk along the cycloid, how far will I walk in 10 seconds?

    asked by Marcia
  181. math

    Write an explicit formula for the sequence one-half, three-sevenths, one-third, five-nineteenths, three-fourteenths, ... Then find a14. (1 point) an = an – 1 – n minus one over seven n; fifteeen over one hundred nintey nine an = a sub n plus one over n

    asked by paige
  182. government

    . The source of the Supreme Court’s authority is (Points : 1) moral suasion. judicial activism. concurring opinion. dissent.

    asked by KB
  183. English

    Help! I need help unscrambling these letters into two words it is due tommorow! The letters are tttrrlnemisianaaon it is the name of a mall, remember its a two letter word

    asked by Alex
  184. science

    what are human factors that causes illhealth,accidents and disasters

    asked by lebogang
  185. math

    jason made 42 bottles of orange juice drink to give to his class. How many pints of juice drink did jason make if each bottle holds 8 fl oz

    asked by kelsey
  186. MATH

    PLEASE EXPLAIN. I DO NOT GET IT!!!!!!!!!HOW DO YOU CALCULATE THIS? 5:05 PM SUBTRACT 1.9 HOURS?

    asked by Anonymous
  187. pROBABILITY AND STATISTIC..HELP...................

    a missile protection system consists of n radar sets operating independently each with probability .9 of defecting an aircraft entering a specified zone.all radar sets cover the same zone.if an airplane enters the same, find the probability that it will be

    asked by Rrjey
  188. Math ! Please Help !

    1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y =

    asked by Becca
  189. English

    Word box: alias amble burly distort dogged dumbfounded extinct fossil grit inevitable ingrained meteoric parody prevail rend replenish rummage skimp sleuth vandalism 3.As the buffalo began to decrease sharply in numbers conservationists feared that it

    asked by Jerald
  190. Calculus please help !

    1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y =

    asked by Becca
  191. math

    Given the equation 2x + 8y = 6, answer the following questions: If x decreases by 2 units, what is the corresponding change in y? ??

    asked by Janise
  192. Pre-calculus; urgent ! Please help !

    1.Graph the polar equation r=3-2sin(theta) 2. Find the polar coordinates of 6 radical 3,6 for r > 0. 3. Find the rectangular coordinates of (7, 30°). 4. Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 5. Write the equation –2x + 6y =

    asked by Becca
  193. Latin

    Check my translations please! 1. Aeneas was ordering the men to run. Aeneas viros currere iubebat. 2. The pretty queen persuades the Trojan to stay. Regina pulchra Troianum manēre persuadet. 3. A tyrant is not able to give freedom to the people. Tyranni

    asked by Anonymous
  194. math

    The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare

    asked by Ashton
  195. biology

    what characteristics appear to show consistent development over the 4 million years of hominid evolution?

    asked by alex
  196. math

    Driver A had been leading archrival B for a while by a steady 3 miles. Only 2 miles from the finish, driver A ran out of gas and decelerated thereafter at a propertional to the square of his remaining speed. One mile later, driver A's speed was exactly

    asked by angah
  197. math

    use Method of variation of parameter y''+y = tan^2 t

    asked by angah
  198. chemistry

    How much heat in joules is required to heat a 44g sample of aluminum from 76 F to 148 F?

    asked by tish
  199. math

    by using method of undetermined coefficients d^2y/dx^2 -5 dy/dx+6y=xe^x

    asked by angah
  200. maths-Circles

    There are two equal chords AB and and CD of a circle whose centre is O , when produced meet at point E. prove that EB=ED and EA=EC

    asked by Anonymous
  201. Physics

    A train is moving towards a destroyed bridge. The velocity of the train remains constant at 20 m/s. A person inside the train realizes that they will die unless they run to the back of the train and jump out. If the person is 15 m from the back of the

    asked by Dan
  202. MONGU COLLEGE

    1.Determine the sum of infinity of the series 4,2,1

    asked by barotseland network
  203. math

    The relationship between the temperature in degrees Fahrenheit (°F) and the temperature in degrees Celsius (°C) is F=(9/5)C+32 (b) What is the slope of the line? ?? What does it represent? (a) It doesn't represent anything. (b)It represents the constant

    asked by Ashton
  204. math

    A bakery can sell muffins for $1 each. If it costs the bakery $5 to make 20 muffins, what percent of the money made from muffins sales is profit

    asked by rachie
  205. World History- (Ms. Sue)

    What are the effects of California's application for statehood?

    asked by Victoria
  206. math

    A community is considering increasing the sales tax rate 0.5% to fund a new sports arena. If the tax rate is raised, how much more will you pay in sales tax on $500?

    asked by betsy
  207. Spanish: Please help

    Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar B.) comer C.)

    asked by James
  208. MONGU COLLEGE

    find the line perpendicular and passes through (0,0) 5x-2y =10

    asked by barotseland network
  209. math

    Julie has been offered two jobs. The first pays $400 per week. The second job pays $175 per week plus 15% commission on her sales. How much will she have to sell in order for the second job to pay as much as the first?

    asked by crystal
  210. Please help quick. Algebra

    solve: 2x^2-3x+5 divided by 2x-1

    asked by Jeconiah
  211. Electromagnetic spectrum

    Some astronomical objects emit no visible light but are known through (blank?) and radio images; satellite observations (blank?) Earth's atmosphere help scientists study space at wavelengths that do not reach Earth's surface?

    asked by Anonymous
  212. Humanities

    the 15 point important events and impact of the renaissance timeline, in details pls

    asked by Johnny Cruzer
  213. math

    f(x)=2x^2−146x+c has 2 roots that are positive prime numbers. What is c?

    asked by Hardwell
  214. math

    the second angle of a triangle is twice the first angle. The third angle is five more than four times the first angle.Find the measure of the second angle.

    asked by Cathy
  215. geometry

    A radio tower casts a shadow 170 feet long. The angle of elevation of the sun is 43 degrees. How high is the tower? Round to hundredths.

    asked by Anonymous
  216. Analytical Chemistry

    Show the predominant form of the amino acid tyrosine at pH=13.9 and ph=7.8. Be sure to include the proper number of hydrogens on heteroatoms and the correct formal charges on atoms. I calculated the pka values for COOH (pka=2.41) NH3 (pka=8.67), and OH

    asked by Sam
  217. Physics

    A pitcher throws a baseball with a horizontal velocity of 132 ft/s (90 mph) toward home plate that is approximately 60 ft. away. What is the vertical drop of the ball when it reaches the plate? g = 32 ft/s^2.

    asked by Dan
  218. math

    f(x)=2x2−146x+c has 2 roots that are positive prime numbers. What is c?

    asked by Hardwell
  219. physical

    A small dog is trained to jump straight up a distance of 1.2 m. How much kinetic energy does the 7.2-kg dog need to jump this high? (The acceleration due to gravity is 9.8 m/s².)

    asked by chelsea
  220. Math

    A tree is 15 ft tall. It casts a shadow 20 ft long. an 8 ft elephant approaches. how long will the elephant's shadow be?

    asked by DJ
  221. math

    The stopping distance D of a car after the brakes have been applied varies directly as the square of the speed s. A certain car traveling at 70 mi/h can stop in 343 ft. What is the maximum speed it can be traveling if it needs to stop in 160 ft?

    asked by El
  222. math

    Donna is 12 years younger than her brother. in 2 years she will be 14 years more than as half as her brother .how old is each now

    asked by althea
  223. communication skills

    what does the letters RX mean in communication skills.

    asked by barotseland network
  224. Maths

    Please help me solve this differential equation : x^3+ ¡¼(y+1)¡½^(2) dy/dx=0

    asked by Taldil
  225. Maths

    Please help me solve this differential equation: dy/dx-(1+1/x)y=y^2

    asked by Taldil
  226. Maths

    Please help me solve this differential equation: dy/dx+ytanx=y^3¡¼sec¡½^4x

    asked by Taldil
  227. math

    Given P=RT/V,make T tgd subject of the formula.

    asked by annecia
  228. maths

    What is the total capacitance of capacitors connected in series, C1=25F, C2=125F ? Round result to whole number.

    asked by mano
  229. math

    john hunt has invested $500.00 in a savings account that pays 6% annual interest, compounded quarterly. After the second quarter of interest has been credited, what is the amount in the account?

    asked by Anonymous
  230. Pre calculus, vectors

    A straight river flows at a speed of 20km/h. A boater starts at the south shore and heads in ths direction of 70degrees from the shore. The boat has a speed of 20km/h in still water. Find the true speed and direction of the boat.

    asked by Halala
  231. Algebra

    Exponents: Simplify the expression 7ab^-2 / 3w I got 7a3w / b^2 Is this correct?

    asked by Casey
  232. math

    what is 7 over 24 converted into simplest form?

    asked by serenity
  233. 6th grade math

    n/4 +32=32 I can get it n/4=40 but not sure how to get n by itself????

    asked by Susan
  234. Math

    Find the product write answer in scientific notation (3 x 10^6) * (2 x 10^12) I got. .6 x 10^ 9

    asked by Marco
  235. Chemistry

    How many moles of magnesium sulfate are needed to make in a solution of 0.10g Mg2SO4?

    asked by Rena
  236. geometry

    what is the perimeter of a pool 7ft wide 10ft long 4ft high? Is it 34ft squared?

    asked by Nic
  237. 6th grade math

    n/4+32=72

    asked by Susan
  238. Math HELP PLEASE! QUICK!

    1.Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 2.Write the equation –2x + 6y = 7 in polar form. 3.Graph the polar equation 2 = r cos(theta – 20°). 4. Write the polar equation in rectangular form. r = –12 cos

    asked by Beccaboo
  239. Chemistry

    Would you expect the pressure of a 12.5 mL syringe of natural gas to be the same as the pressure of 12.5 mL of air? In other words, is Boyle's Law dependent on the type of gas that is being measured?

    asked by Margaret
  240. Pre-calculus HELP PLASE !

    1.Write the rectangular equation in polar form. (x – 4)2 + y2 = 16 2.Write the equation –2x + 6y = 7 in polar form. 3.Graph the polar equation 2 = r cos(theta – 20°). 4. Write the polar equation in rectangular form. r = –12 cos

    asked by Beccaboo
  241. math

    Find the solution x of the following equation : 12X =32.

    asked by gary
  242. Life orantation

    What,according to the Basic Conditions of employment applies with regard to the contraventions?

    asked by S'bongile
  243. Chemistry

    Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.100 M phosphoric acid solution. pKa1 = 2.16 pKa2 = 7.21 pKa3 = 12.32 [H3PO4] = ?

    asked by Nancy
  244. Algebra

    -3(x - 2) -1 > 2 - 5(x -6)

    asked by Crystal
  245. Humanities

    the 15 point important events and impact of the renaissance timeline, in details pls

    asked by Johnny Cruzer
  246. Spanish

    Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar B.) comer C.)

    asked by James
  247. Algebra

    Jim is 45 years old. He is 10 years older than 5 times his niece Carol. How old is Carol

    asked by Circa
  248. Math

    Wirte an exponential growth model. 22. A business had a $20,000 profit in 1990. Then the profit increased by 20% per year for the next 10 years. y=c(1+r)^t y=20,000(1+0.2)^10 Is that correct?

    asked by Emma
  249. Chemistry

    How many moles of NaOH are in 13.2 mL of 3.00 M NaOH?

    asked by John
  250. Differential Equations

    Driver A had been leading archrival B for a while by a steady 3 miles. Only 2 miles from the finish, driver A ran out of gas and decelerated thereafter at a proportional to the square of his remaining speed. One mile later, driver A's speed was exactly

    asked by Won
  251. Chemistry

    Using the balanced equation of: HCl+NaOH-->H20+NaCl, how many moles of HCl could be neutralized with 13.2 mL of 3.00 M NaOH?

    asked by Alicia
  252. Alg. I

    (-5d^-5) (6d^2) -30d^-3 I know that d^-3 goes on the bottom to make it positive;however,does -30 go on the bottom as well? Please explain the rule(s) for this. Thanks

    asked by Jane
  253. world geography

    How has the United States economy impacted its relationship/s with other countries

    asked by delores
  254. math

    If you invest $2500 for one year, part at 8% and part at 12%.....how much was invested at each percentage rate if they both earned the same amount of interest?

    asked by kallista
  255. Life orantation

    What,according to the Basic Conditions of employment applies with regard to the contraventions?

    asked by S'bongile
  256. Psychology - Please check my answers

    1. When considering marital separation and divorce as a social problem, an effective approach might be to: __x_a. develop counseling options for couples in crisis. ____b. focus on problems with the institution of marriage itself. ____c. develop

    asked by Suzy
  257. calculus

    Use logarithmic differentiation: F(x)= (3x+6)^4 (x^3 -2)^5 f'(x)=

    asked by Trevor
  258. math

    6-1x0+2÷2 Please help me

    asked by Melea
  259. Math

    What has a product of 320 and a sum of -36?

    asked by HELP!!
  260. math

    6-1x0+2÷2 Please help me

    asked by Melea
  261. Math

    Given the points A(0,0)B(3,1), and C(1,4), what is the measure of angle ABC?

    asked by Anonymous
  262. physics

    A 200 gram ball gets dropped from a roof at 15 meters high. A boy on the ground catches it. If 10 percent is translated to internal energy, then what was the increase of internal energy? Is it safe to be playing ball from the roof top?

    asked by Anonymous
  263. science

    50 ml of water in a beaker will exert what pressure on the beaker than 50ml of water in a 350ml beaker

    asked by lilt
  264. physics

    the moment of inertia of a thin uniform rod of mass M and length L about an axis passing through a point midway between the centre and one end perpendicular to its length is -----------------------------------

    asked by maheshwari
  265. Physics

    High-speed stroboscopic photographs show that the head of a 197 g golf club is traveling at 36.8 m/s just before it strikes a 45.9 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 25.9 m/s. Find the speed

    asked by josh
  266. physics

    If a boat is being tugged by 2 tug boats 20000 newtons north, the river is flowing at 5000 newtons south what direction is the boat and what's the velocity?

    asked by Anonymous
  267. Math

    Mark has received a tax refund. He used 1/4 of the money to pay off his credit card. Than he spent 1/3 of the remaining money on new clothes and shoes for his kids. After shopping he used 1/5 of what was left to go out to eat. Finally, donated 1/2 of what

    asked by Circa
  268. Physics

    In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly down and head first. In the 2010 Winter Olympics, the track had sixteen turns and dropped 126 m in elevation from top to bottom.

    asked by Bonny
  269. math

    As a a test of a new measurement process, 10 measurements are made on pieces of glass known to have conductivity 1. The average of the 10 measurements is 1.07. Indicate whether 1 and 1.07 is a parameter or statistic and explain why. I understand that 1.07

    asked by Please help
  270. Physics

    High-speed stroboscopic photographs show that the head of a 197 g golf club is traveling at 36.8 m/s just before it strikes a 45.9 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 25.9 m/s. Find the speed

    asked by dallas
  271. Math

    1)A bakery can sell muffins for $1 each. If it costs the bakery $5 to make 20 muffins, what percent of the money made from muffins sales is profit? 2) A community is considering increasing the sales tax rate 0.5% to fund a new sports arena. If the tax rate

    asked by Betsy
  272. Life orientation

    Ways in which pollution(water,air,land)impact the community,provide relevent sources to support your claims

    asked by Anonymous
  273. Comm/330

    what are other kinds of secondary groups.

    asked by Anita
  274. Spanish: Please help

    Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar B.) comer C.)

    asked by James
  275. chemistry

    I need to find the radius of a cylinder with only the following info: Cylinder height=125um There is 1 C atom/0.01848 nm^2 There are 5.75x10^10 C atoms on the surface of cylinder Use quadratic formula to solve

    asked by kelly
  276. Algebra

    f(x) is a polynomial such that f(1) = 8 and f(3) = 16. r(x) is the remainder when f(x) is divided by (x-1)(x-3). What is r(5)?

    asked by John
  277. science

    Why do manufacturing industries have more problems controlling pollution then other kinds of businesses have?

    asked by Lori
  278. physic

    Martha drops a 1 kg rock off the top of Black Oak Canyon which is 100m deep. What is the KE of the rock the instant before it hits bottom? Hint: Conservation of energy states that PE = KE

    asked by POTENTIAL & KINETIC ENERGY PRACTICE
  279. Creative writing

    I want to write a story that is told ONLy through one person's mind; what this one person is thinking and saying, with no other characters speaking. How would you go about formatting it?

    asked by Millie
  280. Science 8R - HELP!

    what is the difference between weathering and erosion???

    asked by Laruen
  281. Linear Algebra

    Prove that If a vector space is of dimension n and a set of vectors spans V, then that set of vectors must be linearly independent.

    asked by John
  282. FINANCE

    What will $10,000,000 be in 12 years if it earns 7% and you add $5,000 at the beginning of every month?

    asked by mary
  283. differential equation urgent !

    using Method of variation of parameter y''+y = tan^2 t

    asked by deq
  284. Math

    Find product and write answer in scientific notation (3 x 10^6). * (2 * 10^12) I got .6 x 10 ^19 Is this right?

    asked by Marco
  285. differential equation urgent !

    Driver A had been leading archrival B for a while by a steady 3 miles. Only 2 miles from the finish, driver A ran out of gas and decelerated thereafter at a propertional to the square of his remaining speed. One mile later, driver A's speed was exactly

    asked by deq
  286. american lit

    the representation of the harshness of the praire on my antonia novel i have to write a three paragraph essay thanks

    asked by Anonymous
  287. 3rd grade math

    one 10 is regrouped as 10 ones in each number. work backwards. write the number with 10 ones grouped as 1 ten again. 1.tens ones 5 15

    asked by mythreyee
  288. science

    What is the highest and lowest temperature in the exosphere? or just the highest temperature.

    asked by Anonymous
  289. Science

    what are some health risks of copper to humans? what are the environmental riks of copper? what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term

    asked by Louis
  290. 3rd grade

    you have 3 dimes. you need a quarter to use a public telephone. what can you do?

    asked by mythreyee
  291. Physics

    A 64.7 kg astronaut is on a space walk away from the shuttle when her tether line breaks. She is able to throw her 14.1 kg oxygen tank away from the shuttle with a speed of 7.45m/s to propel herself back to the shuttle. Assuming that she starts from rest

    asked by Ted
  292. physics

    What is the KE of a 9 kg mass at 2 m/s?

    asked by POTENTIAL & KINETIC ENERGY PRACTICE
  293. college chemistry

    during a liquid-liquid extraction the procedure often calls for the use of saturated NaCl when ether is used as the extraction solvent, but not when dichloromethane is used. why?

    asked by Anonymous
  294. social studies

    what is the nerve center of the american presidency?

    asked by chri
  295. College Algebra

    Provide one example to show how you can use the Expected Value computation to assess the fairness of a situation (probability experiment). Provide the detailed steps and calculations.

    asked by Stacy
  296. Physics

    An 67.6 kg object moving to the right at 38.7 cm/s overtakes and collides elastically with a second 48.9 kg object moving in the same direction at 19.2 cm/s. Find the velocity of the second object after the collision. Answer in units of cm/s

    asked by colby
  297. math

    what is the probability of drawing 5 queens from a standard deck of cards?

    asked by mary
  298. Physics

    A person pushes a 23.5-kg shopping cart at a constant velocity for a distance of 30.3 m on a flat horizontal surface. She pushes in a direction 31.5 ° below the horizontal. A 37.3-N frictional force opposes the motion of the cart. (a) What is the

    asked by Randy
  299. Ms. Sue please help

    What is the highest temperature in the exosphere.

    asked by Bob
  300. Physics

    The concepts in this problem are similar to those in Multiple-Concept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 72.4-kg person straight up by means of a cable. The person has an

    asked by Randy
  301. College Algebra

    Develop a tree diagram for tossing two, eight-sided gaming dice to figure out how many possibilities there are. Discuss the purpose of using such a visual in working out probability.

    asked by Stacy
  302. Chemistry

    What volume of 1.60 M SrCL2 is needed to prepare 525 ml of 5.00mM SrCl2?

    asked by Candace
  303. spainsh 2 help please

    can someone check my answers please? 1. Si yo Tuviera Hambre, Me volvería a comer (comer.) 2. Si el bebe Tuviera sueño, eL estaría en bed (dormir.) 3. ¿Que te necesito to (gustar) pedir? 4. Me loved (gustar) las pechugas de pollo. 5. Si yo fuera Tom

    asked by alexus
  304. Physics

    A bicyclist rides 2.78 km due east, while the resistive force from the air has a magnitude of 6.52 N and points due west. The rider then turns around and rides 2.78 km due west, back to her starting point. The resistive force from the air on the return

    asked by Randy
  305. Multivariable Calculus

    Find the linearization L(x,y)of the function f(x,y) at P_0. Then find an upper bound for the magnitude |E| of the error in the approximation f(x,y)=L(x,y) over the rectangle R. f(x,y) = (1/2)x^2 + xy + (1/4)y^2 + 3x - 3y + 4 at P_0(2,2),R:|x-2|

    asked by Jackie
  306. math 116

    What would be the value of expressing something like the national debt in scientific notation? What information would be lost in such a usage? Is that important? Explain why or why not

    asked by meka a
  307. chemistry

    Express your answers as integers separated by commas.

    asked by Anonymous
  308. Physics

    The drawing shows a skateboarder moving at 5.40 m/s along a horizontal section of a track that is slanted upward by 48.9 ° above the horizontal at its end, which is 0.582 m above the ground. When she leaves the track, she follows the characteristic path

    asked by Randy
  309. science

    Name one similarity and one difference between pitch and loudness.

    asked by Ms.Vargas
  310. Physics

    A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 78 kg, and the height of the water slide is 12.5 m. If the kinetic frictional force does

    asked by Randy
  311. Physics

    In attempting to pass the puck to a teammate, a hockey player gives it an initial speed of 2.95 m/s. However, this speed is inadequate to compensate for the kinetic friction between the puck and the ice. As a result, the puck travels only one-half the

    asked by Randy
  312. Physics

    A ball is dropped from a height of 5.67 m. If the ball rebounds with a speed of 4.22 m/s, what is the coefficient of restitution? a. .40 b. .74 c. .56 d. 1.23 I've ruled d out because it is greater than 1.

    asked by Kaci
  313. math

    a field trip will cost 7 dollars per student. write an expression to find the cost of the field trip for s students. what is the total cost if 26 students go on the trip?

    asked by niza
  314. Physics

    Multiple-Concept Example 13 presents useful background for this problem. The cheetah is one of the fastest accelerating animals, for it can go from rest to 34.7 m/s in 3.03 s. If its mass is 102 kg, determine the average power developed by the cheetah

    asked by Randy
  315. Chemistry

    Consider the titration of 25.0mL of 0.10M HAc with 0.10M NaOH. That is, NaOH is added to HAc. (a)pH at the beginning of titration. (b)pH at the equivalence point of the titration. (c) pH at the midpoint of the titration.

    asked by Layla
  316. Spanish 2 help please

    Can someone check my answers? Provide the correct word (quién, quien, qué, que, como, cómo, cuánto, cuanto, cuántos, cuantos, cuando, dónde, donde) to fill in the blank for the following sentences: 1. Susana es de España __cuando____ está en

    asked by alexus
  317. statistics

    Suppose a random sample of 80 measurements is selected from a population with a mean of 65 and a variance of 300. Select the pair that is the mean and standard error of x.

    asked by veronica
  318. Calculus

    For what values of x does the graph of F9x) = 2x^3 - 3x^2 + 12x + 87 have a horizontal tangent?

    asked by Amy
  319. Science

    i need to unscramble a phrase about Plate Tectonics with these letters: rorpsfgnlsadeeasi

    asked by Jalen
  320. Math

    Mrs. Smith wanted to stimate the length of her porch so she would know how much paint to buy. Which would be the best benchmark for her to use? A. her fingertip B. a license plate C. a baseball bat D. how far she could walk in 20 minutes

    asked by Anonymous
  321. science

    find the theoreticval value of the period of a pendulum of length 0.9 meters located on the surface of the earth.

    asked by princess
  322. Math

    Anna wanted to measure the capacity of a large bucket. What unit of measure should she use? A. cups B. pounds C. inches D. gallons

    asked by Anonymous
  323. Literature

    Hi where can I find a free on line thing to check my writing ?

    asked by Sam
  324. math

    find the perimeter for 11in + 9 1/2in + 7in + 9 1/2in

    asked by kareem
  325. Algebra

    Power Standard Form 10^1 10 10^2 100 10^3 1000 10^4 10000 10^5 100000 Explain how the number of zeros in the standard form of a power of 10 relates to the exponent. Write a rule for the number pattern as well.

    asked by Deanne
  326. trig

    Four wires support a 40-meter radio tower. Two wires are attached to the top and two wires are attached to the center of the tower. The wires are anchored to the ground 30-meters from the base of the tower.

    asked by Tina
  327. Algebra

    How do I write an equation of a line that passes through the point (-31,22) and is parallel to this equation: 16x + 13y= -210

    asked by Beth
  328. math

    How many btu's are absorbed when100 lbs of water is heated from 100f to200f

    asked by kevin
  329. math

    Beth makes a quilt that was 3 ft wide. Its perimiter was 16 ft. What was its area?

    asked by Trent
  330. algebra

    21/25 times 10/99 times 27/14

    asked by Anonymous
  331. math

    jan bought 17 stamps. andy bought 3 times as many stamps. how many stamps did andy buy

    asked by Anonymous
  332. Algebra

    How do I write an equation of a line that passes through the point (-31,22) and is parallel to this equation: 16x + 13y= -210

    asked by Beth
  333. Trig

    Four wires support a 40-meter radio tower. Two wires are attached to the top and two are attached to the center of the tower. The wires are anchored to the ground 30-meters from the base of the tower. What is the total length of wire needed?

    asked by Tina
  334. Algebra

    If a temperature dropped from 44degrees to -56 degrees in a 24 hour period, how many degrees did the temperature drop during that time?

    asked by Stephanie
  335. Science!! please help me could you write it to me

    Name one similarity and one difference between pitch and loudness

    asked by Ms.Vargas
  336. Maths

    In a quadratic sequence.....Term 2 is 11,Term 4 is -7,term 7 is -64....determin the general term for the sequence

    asked by Lucas
  337. SCIENCE URGENT HELP

    what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the names of any organisms that are affected and how they are affected by

    asked by Louis
  338. trig

    A population of wolves in a country is represented by the equation p(t)=80(0.98)^t, where t is the number of years since 1998. Predict the number of wolves in the population in the year 2008. how many years will it take for the population of wolves to

    asked by Anonymous
  339. Maths

    (a) find d largest four digit number which has a total of exactly 3 factors. Assuming that one and the number itself are factors. (b) find a and b greater than zero such that a^2=b^3. (c) find. x and y such that x^3 + y^3 =1729

    asked by Very urgent please
  340. Algebra

    How do I write an equation of a line that passes through the point (-28, -5) and is parallel to y= -5 45 X - _ __ 8. 2

    asked by Beth
  341. Science

    What is the momentum of a 50 kg carton that slides at 2 m/s across an icy surface? The sliding carton skids onto a rough surface and stops in 3 s. Calculate the force of friction it encounters.

    asked by George
  342. Social Studies

    Which of the following did not influence greek mythology? a. the kingdom of Minos b. knowledge of Egyptian mythology c. Roman culture d. Mycenae culture

    asked by Johnny
  343. Physics

    One component of a magnetic field has a magnitude of 0.0445 T and points along the +x axis, while the other component has a magnitude of 0.0725 T and points along the -y axis. A particle carrying a charge of +1.01 × 10-5 C is moving along the +z axis at a

    asked by Anonymous
  344. college algebra

    given the function fx=x^3+x a) find the rate of change between the two stated values for x: 1 to 2 B)find the equation of a secant line containing the given points (1,f(1))and (2,f(2)

    asked by zachary
  345. math

    1. Mickey has the number of books that Minnie does. If they had 1 less book between them, they would have 27 books. The question, of course, is how many books each has.

    asked by Anonymous
  346. World History- (Ms. Sue)

    What are the effects of abolitionism?

    asked by Victoria
  347. Social Studies

    The Oracle of Zeus was located in a.Delphi b.Samos c.Sparta d.Mount Olympus

    asked by Johnny
  348. Physics

    The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure.

    asked by Arif khan
  349. Physics

    In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly down and head first. In the 2010 Winter Olympics, the track had sixteen turns and dropped 126 m in elevation from top to bottom.

    asked by Bonny
  350. Math

    24x^3y^2/42x^7y^-6 please help i need to simplify i can only use positive intergers

    asked by Alex
  351. CSU

    what is the freezing point of 16.7g of LiCl in 136g of water, assuming complete dissociation for water kf= -1.86/mol

    asked by Chloe
  352. Math

    24x^3y^2/42x^7y^-6 please help i need to simplify i can only use positive intergers

    asked by Alex
  353. Math

    24x^3y^2/42x^7y^-6 please help i need to simplify i can only use positive intergers

    asked by Alex
  354. Chemistry

    what is the empirical formula for a compund with 26.2 g N, 7.5 g H, and 66.3 g Cl?

    asked by Anonymous
  355. Chemistry

    I have o.236 g for urea and 0.235g for NaCl. And the question is On a gram basis, which is more effective in depressing the freezing point, urea or NaCl? On a mole basis, which Is more effective? I am confused on what depressing the freezing point me and

    asked by K
  356. math fractions

    ADAM WANTS TO COMPARE THE FRACTIONS 3/12,1/6,AND1/3.HE WANTS TO ORDER THEM FROM LEAST TO GREATEST AND REWRITE THEM SO THEY ALL HAVE THE SAME DENOMINATOR?EXPLAIN HOW ADAM CAN REWRITE THE FRACTIONS?If anyone could helpme explain this to my 4 th grader.i am

    asked by ttuuffyy
  357. Physics

    The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure.

    asked by Arif khan
  358. science

    why is viscosity such an important property of matter?

    asked by Dave
  359. Lang. Arts

    The line “Where water is not thirsty” is an example of which type of figurative language? A.symbol B.metaphor C.simile D.personification I think it is D...?

    asked by Cassie
  360. science

    You are standing stationary along the side of the railroad tracks. A toy cannon shoots a baseball at 9 m/s. The cannon is mounted facing forward on the handlebars of a bike. Your friend is riding the bike from the front toward the back of a train car at 5

    asked by aly
  361. Math

    At a certain time of day, a tree that is Xft tall cast a shadow that is X-35 meters long if the distance from the top of the tree to the end of the shadow is X+5 meters, what is the height, X, of the tree?

    asked by Alex
  362. Algebra 2..

    a rule of thumb used by car dealers is that the trade in value of a car decreases by 20% of its value each year. suppose the initial value of your car is $23,500. write an equation expressing the trade in value of your car as a function of the number of

    asked by Anonymous
  363. Lang. Arts

    Read the following stanza from “Alone”: Lying, thinking Last night How to find my soul a home Where water is not thirsty And bread loaf is not stone I came up with one thing And I don’t believe I’m wrong That nobody, But nobody Can make it out here

    asked by Cassie
  364. Algebra

    Which of the following examples would show a negative trend? A.height and weight of students B.test scores and height of students C.outside temperature and heating bill D.none of these I think it is D....?

    asked by Cassie
  365. math

    After 7 spelling test Matthew scored 68, 81, 90, 95, 51, 83, and 85. If he wants his average to be 80, what does his next score need to be.

    asked by alyson