Questions Asked on
March 11, 2010

  1. chemistry

    Compare a mole of Ag-108 and a mole of Pt-195 using atoms, protons, electrons, and neutrons.

    asked by Astrid
  2. precalculus

    an airplane flying at 550 miles per hour has a bearing of N 52(DEGREES)E. After flying 1.5 hours, how far north and how far east has the plane traveled from its point of departure?

    asked by sara
  3. Math

    A box has a bottom with one edge 7 times as long as the other. If the box has no top and the volume is fixed at V, what dimensions minimize the surface area?

    asked by Matt
  4. Chemistry

    Given an unknown mixture consisting of two or more substances, explain how we could determine whether that mixture is a true solution, a colloid, or a suspension

    asked by Anonymous
  5. Precalculus

    Rosea drives her car 30 kilometers to the train station, where she boards a train to complete her trip. The total trip is 120 kilometers. The average speed of the train is 20 kilometers per hour faster than that of the car. At what speed must she drive her

    asked by Alonzo
  6. physics

    A helium balloon and its gondola, of mass M, are in the air and stationary with respect to the ground. A passenger, of mass m, then climbs out and slides down a rope with speed v, measured with respect to the balloon. With what speed (relative to Earth)

    asked by Anonymous
  7. Pre-Cal(Please check)

    Approximate the equation's solutions in the interval (0,2pi) sin2x sinx = cosx 2cos(x) (1/2-sin^2x) = 0 Then I got 3pi/2, pi/2, pi/6 and 5pi/6 Then I substituted 0-3 and got 3pi/2 , 5pi/2 , 9pi/2 , pi/2, pi/6, 7pi/6, 13pi/6 , 19pi/6 , 5pi/6 , 11pi/6 ,

    asked by Abbey
  8. Chem

    Solid carbon dioxide (dry ice) goes from solid to gas at -78C. The molar heat of sublimation is 25.3 kj/mol. In one experiment 34.5g of dry ice are placed in an insulated isolated container with 500 g of water at 25C. What temp of the water is expected

    asked by Kelly
  9. pulley and rotation

    Two masses, mA = 35.0 kg and mB = 42.0 kg, are connected by a rope that hangs over a pulley (as in the figure). The pulley is a uniform cylinder of radius 0.50 m and mass 4.8 kg. Initially mA is on the ground and mB rests 2.5 m above the ground. If the

    asked by Anonymous
  10. physics

    Two balls, of masses = .029 kg and = .06 kg, are suspended. The lighter ball is pulled away to a 60 degree angle with the vertical and released. What is the speed of the lighter ball before impact?

    asked by Anonymous
  11. Chemistry

    Calculate the decrease in temperature when 2.00 L at 20.0 C is compressed to 1.00 L

    asked by Engie
  12. physics

    The CM of an empty 1300 kg car is 2.40 m behind the front of the car. How far from the front of the car will the CM be when two people sit in the front seat 2.80 m from the front of the car, and three people sit in the back seat 3.80 m from the front?

    asked by Anonymous
  13. Chem hw!

    1. What pressure would be needed to compress 25.1 mL of hydrogen at 1.01 atm to 25% of its original volume? 2. If the pressure on a 1.04-L sample of gas is doubled at constant temperature, what will be the new volume of the gas? 3. A 1.04-L sample of gas

    asked by Teisha
  14. Algebra 2

    Carbon Dating: Use the formula y= ae^-.00012t where a is the initial amount of carbon-14 , t is the number of years ago the animal lived, and y is the remaining amount after t years how old is a fossil remain that has lost 95% of its carbon-14

    asked by Ana
  15. English

    Can you writeacher tell me if the following statements are correct. I know they are not dictionary definition but I would like to know if they are possible in English. Thank you for your cooperation. 1) A third-person narrator tells the story in third

    asked by Franco
  16. college

    You are trying to overhear a juicy conversation, but from your distance of 16.0 , it sounds like only an average whisper of 20.0 . So you decide to move closer to give the conversation a sound level of 65.0 instead. How close should you come?

    asked by jim
  17. Math

    A box has a bottom with one edge 7 times as long as the other. If the box has no top and the volume is fixed at V, what dimensions minimize the surface area? Please help me find the COMPLETE dimenssion of the box.

    asked by Matt
  18. Chem hw!

    1. What pressure would be needed to compress 25.1 mL of hydrogen at 1.01 atm to 25% of its original volume? 2. If the pressure on a 1.04-L sample of gas is doubled at constant temperature, what will be the new volume of the gas? 3. A 1.04-L sample of gas

    asked by Teisha
  19. Auditing

    1. Which of the following matters would an auditor most likely consider to be a significant deficiency to be communicated to the audit committee? A. Management's failure to renegotiate unfavorable long-term purchase commitments. B. Recurring operating

    asked by Bob
  20. another rotation

    A hollow cylinder (hoop) is rolling on a horizontal surface at speed v = 1.85 m/s when it reaches a 23.5° incline.How far up the incline will it go? How long will it be on the incline before it arrives back at the bottom? Again, I am so confused about

    asked by Liz
  21. chemistry

    Question about titration calculations in analysis of antacids lab. We did a lab yesterday with antacids, HCl and NaOH and I'm having trouble doing the calculations. The information known is the following: 1)0.10M NaOH 2)0.10M HCl 3)Mass of Antacid .22g

    asked by Mindy
  22. Chemistry

    What is the hydroxide ion concentration in a solution with [H3O-] = 7.67 x 10^-9M

    asked by Anonymous
  23. psychology

    if family planned to spend $370 for food during March but spent only $348,this difference would be referred to as a: a)surplus b)deficit c)budget reduction d)contribution to net worth IS D RIGHT ANSWER? THANK YOU:))))

    asked by vedrana
  24. business

    You conduct a survey of a sample of 25 members of this year’s graduating marketing students and find that the average GPA is 3.2. The standard deviation of the sample is 0.4. Over the last 10 years, the average GPA has been 3.0. Is the GPA of this

    asked by joi
  25. Science

    After a soccer ball is kicked into the air, what force or forces are acting on it?

    asked by Summer
  26. chemistry

    double indicator titration of phosphoric acid with sodium hydroxide

    asked by Anonymous
  27. Algebra 2/ Chemistry?

    Carbon Dating: Use the formula y= ae^-.00012t where a is the initial amount of carbon-14 , t is the number of years ago the animal lived, and y is the remaining amount after t years how old is a fossil remain that has lost 95% of its carbon-14

    asked by Ana
  28. Math

    Which uppercase letters of the alphabet have rotational symmetry?

    asked by Anonymous
  29. rotations2

    A hollow cylinder (hoop) is rolling on a horizontal surface at speed v = 1.85 m/s when it reaches a 23.5° incline.How far up the incline will it go? How long will it be on the incline before it arrives back at the bottom?

    asked by Anonymous
  30. math2

    Solve the problem. You traveled 189 miles on 7 gallons of gasoline. At this rate, how many gallons of gasoline would you need to travel 297 miles?

    asked by pat
  31. chemistry

    A chemist has 12.0 M HBr and would like to use it to make 500.0 mL of 3.5 M HBr. describe how she should do this

    asked by ANNA
  32. chemistry

    For the reaction: Mg + 2 HCl => MgCl2 + H2 a) How many grams of HCl are required to react with 62.0 g of Mg?

    asked by Stacie
  33. physics

    A rocket of total mass 2580 kg is traveling in outer space with a velocity of 111 m/s. To alter its course by 32.0 degrees, its rockets can be fired briefly in a direction perpendicular to its original motion. If the rocket gases are expelled at a speed of

    asked by peyton
  34. Chemistry

    2H2 (g) + O2 (g) 2H2O (g) what is the likely magnitude of the equilibrium constant? a) k < 10 ^-3 b) 10^-3

    asked by Katie
  35. Math

    Greg is opening a car wash. He estimates his cost equation as C= 5000 +0.05x and his revenue equation as where R=1.9x is the number of cars washed in a six-month period. Find the number of cars that must be washed in a six-month period for Greg to make a

    asked by LaLa Help me please!!
  36. math (always)

    if peter has 60 basball cards in his collection how many baseball football and basketball cards does he have? my answer was-20 baseball cards 10 football cards 10 basketball cards

    asked by 3mmi3
  37. calculus/physics

    A force of 10 pounds stretches a spring 2 inches. Find the work done in stretching this spring 3 inches beyond its natural length

    asked by deb
  38. French

    Could you check these thanks. We are working on les actions réciproques. 1. Pierre parle à Marie. Marie parle à Pierre. Answer: Ils se parlent. 2. Pierre aime Marie. Marie aime Pierre. Answer: Ils se aiment. 3. Je t'aime. Tu m'aimes. Answer: Nous nous

    asked by Lisa
  39. physics

    How far will 350 joules raise a block weighing 7 newtons?

    asked by tori
  40. estimating

    A security analyst specializing in the stocks of the motion picture industry the relation between the number of movie theater tickets sold in December and the annual level of earnings in the motion picture industry. Time-series data for the last 15 years

    asked by Anne
  41. english

    what is a good thesis statement for jim crow laws?

    asked by tanisha
  42. CHEM

    Suppose that the microwave radiation has a wavelength of 10.8 cm. How many photons are required to heat 225 mL of coffee from 25.0*C to 62.0*C ? Assume that the coffee has the same density, 0.997 g/mL , and specific heat capacity, 4.184 J/(gK), as water

    asked by baubi
  43. physics

    A 250. MW coal-fired power plant burns fuel with an energy density of 35.0 MJ kg-1. Water enters the temp reduction tower at 293 K and leaves at 350. K at a rate of 4200. kg s-1. 4. Calculate the energy removed by the water each second. 5. Calculate the

    asked by needs help
  44. physics

    A 12100 kg railroad car travels alone on a level frictionless track with a constant speed of 20.5 m/s. A 5850 kg load, initially at rest, is dropped onto the car. What will be the car's new speed?

    asked by Anonymous
  45. geometry

    In the diagram, ABCDE is a regular pentagon with the measure of represented by 2x + 1. If the perimeter of the pentagon is 45, find the value of x.

    asked by nini
  46. physics

    A 250. MW coal-fired power plant burns fuel with an energy density of 35.0 MJ kg-1. Water enters the temp reduction tower at 293 K and leaves at 350. K at a rate of 4200. kg s-1. 4. Calculate the energy removed by the water each second. 5. Calculate the

    asked by emily
  47. CMIS

    What is the current practical limit on the number of GEO satellites?

    asked by Don
  48. chemistry

    Explain how you would convert from number of atoms of a specific element to its mass??

    asked by Jeaninne
  49. Algebra II

    The Officejet printer can print a dissertation in 10 minutes. It takes the Deskjet printer 16 min to copy the same document. If the two machines work together, how many minutes will it take to copy the document?

    asked by Kristi
  50. Math!

    Pls help me on this, i dunno the answer but i got the answer of my own, but its wrong nad this paper is already marked, but i still cant seem to understand how to solve this! A furniture store bought an item for $810 less 15%. The store's expenses are 38%

    asked by Thara!
  51. math

    Write the probability as a decimal,percent and fraction. C) has a "50-50" chance D) will happen about 3 times out of 4 E) has 2 chances in 3 of happening C)0.5,50%,50/N D)0.75,75%,3/4 E)0.66,66%,2/3 Thanks!:) PsyDAG Is my Answer correct?

    asked by Anonymous
  52. geometry

    In ΔABC, AB is of the length of , and AC is of the length of . The perimeter of ΔABC is 24. (a) AB = ___units. (b) AC = ___units. (c) BC =___ units

    asked by nini
  53. chemistry correction

    1. Which two elements react vigorously with each other? A: Chlorine and lithium B:Chlorine and potassium C:iodine and lithium D:iodine and potassium my answer is B 2. which statement about electronegativty is correct. A: Electronegativity decrease across a

    asked by Richard
  54. Calculus

    Find the normals to the curve xy + 2x - y = 0 that are parallel to the line 2x + y = 0. I can find the normal lines and the slope but I don't know what I'm suppose to do with the line 2x + y = 0

    asked by John
  55. com 150

    what kind of conclusion does the writer use? what is the impact of that kind of conclusion in this essay? the essay is : the difference between sin and circumstance.

    asked by D-Man
  56. Chemistry

    For a reversible reaction where A + B (both arrows) C + D, the equilibrium constant is represented by kc = 5.3 = (c)(d)/(A)[B]. Initially A and B are present at 2.00 M each. What is the final concentration of A once equilibrium is reached. I made an ICE

    asked by Katie
  57. chemistry

    need answer to the following: for each molecular compounds, write the name corresponding name or write chemical formula to: A)nitrogen pentasulfide B)diphosphorus pentasulfide C) AS2S3 D)PBr5

    asked by gina
  58. math

    Lydia Rise us building a terraium and needs to buy two sizes of gravel and soil to go in the bottom. The terraiun is 24 in longs, 14 in wide, and 15 in tall. A.The bottom layer is pea gravel and needs to be 2 inches deep. How many cubic inches will she

    asked by Hobo
  59. science

    "Two children who are fighting over a toy pull on it from opposite sides. The result is a stand-off. Explain this in terms of the net force."

    asked by Lena
  60. Math

    Differentiate in terms of x: 1] y = cos^3 5x 2] y = sec^2 3x

    asked by Ren
  61. college physics

    Now assume that the pitcher throws a 0.145 kg baseball parallel to the ground with a speed of 32 m/s in the +x direction. The batter then hits the ball so it goes directly back to the pitcher along the same straight line. What is the ball's velocity just

    asked by Anonymous
  62. math

    You roll 2 six-sided dice. Give the probability of rolling the total 2.

    asked by deandre
  63. precal

    find the exact value: sin(315-60)

    asked by john 2020
  64. math

    peter bought a bag of candy. He gave away ten percent of the candy too his wife and the gave three pieces to meg. he gave one forth of what he had left to his friend joe and then ate half of the remaining 18 peaces of candy. How many pieces of candy were

    asked by jake
  65. Accounting

    Your department’s accounting software is extremely outdated and you have included the purchase of new software in this year’s fiscal budget. You have decided it is time to start looking into purchasing your company’s accounting software and have

    asked by jmama
  66. physics

    A long straight wire of radius R = 1 cm carries a total current I = 1 Amp which flows uniformly through the cross-section of the wire. Draw a diagram of this wire and the current and the magnetic field which is produced. Using Ampere’s law solve for the

    asked by joshua
  67. math

    Geral and michelle went on a 24 bike-ride. By lunch time they had ridden 5 eigth of the total distance. How many miles did they have left to ride after lunch?

    asked by Julie
  68. Algebra II

    The Officejet printer can print a dissertation in 10 minutes. It takes the Deskjet printer 16 min to copy the same document. If the two machines work together, how many minutes will it take to copy the document?

    asked by Kristi
  69. Chemistry II (College)

    How would I go about solving this problem? Can someone show me an equation that can be used? The decomposition of dimethyl ether at 504°C is a first-order reaction with a half-life of 27 min. (CH3)2O(g) CH4(g) + H2(g) + CO(g) (a) What will be the partial

    asked by Tim
  70. science

    The earth exerts a force of 2200N on an orbiting communications satellite that is 35mi above the earth..What is the magnitude of the force the satellite will exert on the earth??

    asked by Elver Gon
  71. Math

    The function W(d) = 0.112d approximates the amount in centimeters of water that results from d cm of snow melting. find the amount of water that results from snow melting from depts of 15cm, 26 cm, 70 cm

    asked by Liz
  72. Incorrect comma usage?-

    This begins with the titan Cronos’ mother, Earth, who encourages her children to overthrow their father, Heaven, because out of dislike, he keeps them locked away. does this look right?

    asked by Claire
  73. chem

    Hexane, a component of gasoline, releases more energy per mole when it combusts than does nitroglycerine when it explosively decomposes. Explain why hexane is a better fuel and nitroglycerine is a better explosive. Is it because hexane release its energy

    asked by Anonymous
  74. keyboarding and word processing

    1.Secretary A will use “Sincerely” as the complimentary closing of a letter to a colleague. Secretary B will use “Cordially” as the complimentary closing of a letter to a friend. Which secretary is using the correct closing A. Only secretary A C.

    asked by Angie
  75. chemistry

    how do u calcualte the percent of hydrogen and carbon if given their mass in grams?

    asked by hilde
  76. English

    Is there a website that you can type in a sentence and it will give you the parts of speech of that sentance?

    asked by Samantha
  77. science

    mass is usually measured in?

    asked by Nick
  78. Geometry

    Give the dimensions of a picture frame that is a golden rectangle.

    asked by Anonymous
  79. English

    The popularity of blogging isan example the public producing the media the public regulating the meadia or could the answer be both above

    asked by Betty
  80. Determinants

    Why are finding determinants important? Aside from Cramer's rule when are determinants used?

    asked by Kevin
  81. college

    Write a 350-700 -word response describing each court level and its responsibilities. Then, describe the two main differences you found between the state and federal court systems.

    asked by yolanda
  82. Calculus

    Find the normals to the curve xy + 2x - y = 0 that are parallel to the line 2x + y = 0. I can find the normal lines and the slope but I don't know what I'm suppose to do with the line 2x + y = 0

    asked by John
  83. algebra

    In a large survey, it was discovered that 1 out of every 5 adults visits Disney World every year. If 30 adults are randomly selected, what is the probability that exactly 7 of them will visit Disney World this year?

    asked by Ciera
  84. math

    A landscaping company sells 40-pound bags of top soil. The actual weight x of a bag, however, may differ from the advertised weight by as much as 0.75 pound. Write an inequality involving absolute value that expresses the relationship between the actual

    asked by Dk
  85. Pre-Cal(Please check)

    sqrt2 /10 Do I just leave this as sqrt2/10 or can I reduce it to sqrt1/5?

    asked by Abbey
  86. chemistry

    There are 50.0 grams of NH3 + Na which produce NaNH2 + H2 (unbalanced) How much grams is produced with the excess of the reactant?

    asked by Jakov
  87. Physics

    In the circuit below all light bulbs are identical. In order of brightest to dimmest the light bulbs are ... This is the best I could do, to try and replicate what the original circuit looks like : where the x's are just the wire; A,B, C, D, and E are the

    asked by Sandra
  88. math

    How many liters are in 200 milliliters

    asked by carol
  89. Physics

    What is the direction of the net magnetic field at the point? I'll describe the figure here: Imagine a cartesian plane. At (0,y) is a wire carrying a current out of the screen. At (0, -y)is a wire carrying identical current out of the screen. At (x, 0) is

    asked by anony mouse
  90. 8th grade litrature

    literary terms in wreck of the hesperus

    asked by thomas
  91. Chemistry

    Find the Ph of solutions with the concentrations 1.15 x 10^-6M

    asked by Anonymous
  92. Chemistry

    A 8.6 x 10^-3M solution of H3PO4 has a pH=2.30. What is Ka for H3PO4

    asked by Anonymous
  93. science

    If a atom has 26 protons, 26 electrons, and 30 neutrons, what is its mass number?

    asked by John
  94. math

    1. Sphere C(-2,1,-3), radius=7. T plane at (4,-2,-1)=? (a) 6x-3y+2z=0 (b) r.(6,3,2)=28 (c) 5x-3y-2z=28 (d) r.(6/7,-3/7,2/7) 2. Sphere (x-1)²+(y-5)²+(z-2)²=49 and planr r.(-2,-6,-3)=0 form which circle?(a) (x-1)²+(y-5)²+(z-2)²=19.53 (b) C(0,0,0),

    asked by Anonymous
  95. math 12 logarithms

    I need to express log base 5 sqrt5 =0.5 in exponential form. Would it be 5^0.5 =sqrt5. I'm not really understanding this unit very well. Any explaination would be greatly appreciated.

    asked by sandy
  96. Math

    Write an equation of the line containing the given point and parellel to the given line. (2,-6); 9x-5y=4

    asked by Liz
  97. Math

    In 1920, the record for a certain race was 46.6 sec. In 1980, it was 45.4 sec. Let R(t)= the record in the race and t = the number of years snce 1920. a) Find a linear function that fits the data R(t) = b) Use the function in (a) to predict the record in

    asked by Liz
  98. health

    1 page paper about how you can help contribute to a healthier enviromnet

    asked by Anonymous
  99. vocab for cultures * dev

    sentence with the word & meaning with commune

    asked by Stacey
  100. Computer science

    PLEASE SOMEONE HELP ME! I need help calculating the charges and setup to display savings. 1. Help with calculations. No matter the numbers i input just the base rate comes up. 2. I need help changing the code to "Modify the program so it calculates and

    asked by John
  101. vocab cultures & dev

    sentence with the word cultural diffusion in it

    asked by Stacey
  102. physics

    two charged objects carry a negative charge of 2*10c. calculate their distance apart if the force between them is 10n

    asked by innocent
  103. Chemistry

    You have KI and Pb(NO3)2 being mixture to give you an insoluble salt. What is the ionic equation per insoluble salt.

    asked by Janelle
  104. Chemistry

    What is a balance equation for sulphuric acid and copper oxide and please explain how you got the correct answer.

    asked by Jose-Ann
  105. math_pre-calc

    Find the equation of a circle that passes through the points (6,3) ans (-4,-3) and whose center lies on the line y=2x-7

    asked by Lenna
  106. english

    compound words -which is correct thirty one -self-evident -QUICKLY-RUNNING -OR SPUR OF THE MOMENT-DECISION

    asked by jacob
  107. science

    Liters and milliters are used for measuring?

    asked by Nick
  108. grammar

    1. red hots and candy corn (is,are)johns favorite candy. (is) 2. neither Alex nor the rest of the group (is,are) interested in the trip. (are) 3. both benny and jerry (dislikes,dislike)winter. (dislike) 4.fruits and vegetables (is,are)part of a balanced

    asked by Sara
  109. algebra

    -x/5 = 1/16 solve using the multiplication principle

    asked by dora
  110. algebra

    -72 / (-92) rewrite the division as a multiplication

    asked by dora
  111. algebra

    use a commutative law to find an equivalent expression for 94 + xy

    asked by bella
  112. algebra

    translate to an algebraic expression. use x and y for variables. three less than a product of two numbers

    asked by ariel
  113. Math

    Hi I need help figuring out these to word problems. Tom has created a scale drawing of his property for use in designing a landscape plan. 1 in on is drawing corresponds to 12 ft. There is a pond that is 112 ft. long on his property. How long will it

    asked by Jennifer
  114. History

    This was one of my few questions that i was struggling with. A) Describe the growth of North American slavery from 1619 to 1789. Include the status of the first Africans in North America, laws later established to govern them, and the reasons why planters

    asked by Michael
  115. Math

    solve the polynomial equation (x+5)(x+1)=45

    asked by Anonymous
  116. Algebra

    Factor completely this trinomial 3y^3+15y^2+18y

    asked by Anonymous
  117. SOCIAL STUDIES

    U. S. GOVERNMENT ENFORCEMENT OF ENVIRONMENTAL REGULATION HELP PROMOTE ECONOMIC GROWTH AND STABILITY?

    asked by JULIAN
  118. math

    Let {xn} be a sequence converging to á.? Suppose the errors en = |xn – á| satisfy en+1< or = Men^2en -1 for some constant M>0. What can be said about the order of convergence?

    asked by Mat78
  119. world history

    how did the search for religious freedom affect the founding of colonies in american?

    asked by hillary`
  120. physics rotations-please help

    Two masses, mA = 35.0 kg and mB = 42.0 kg, are connected by a rope that hangs over a pulley (as in the figure). The pulley is a uniform cylinder of radius 0.50 m and mass 4.8 kg. Initially mA is on the ground and mB rests 2.5 m above the ground. If the

    asked by Liz
  121. Science

    What two things must be measured to find the speed of a moving bicycle? a. mass and inertia b. distance and time c. gravity and friction d. position and motion

    asked by Rashawn
  122. grade 12 trig

    If cos A-1=0, where 0

    asked by juliet
  123. Algebra

    Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 1/5x -1/4 y = 3 2/5x + 1/2y = 2

    asked by Kim
  124. Geometry

    Find the perimeter and area of a square with diagonal length of 20cm.. Leave your answer in simplest radical form

    asked by Laverne
  125. science

    YOUR DESK IS CLASSIFIED AS A SOLID BECAUSE IT HAS A DEFINITE SHAPE AND VOLUME AT?

    asked by kYLYN
  126. Geometry

    In a triangle Cos X = 12\13 What are sinx and tanx?

    asked by Anonymous
  127. Pre-Cal

    Find cos(2x) if sin = 7/25 and x lies in quadrant 1 My answer was 336/625 but this was wrong. I do not know how to figure this out.

    asked by Hannah
  128. Math 10th grade

    five marbles in a jar are green. the odds against choosing a green marble are "4:1" how many marbles are in the jar

    asked by nic
  129. statistics

    The accounting department at Weston Materials, Inc., a national manufacturer of unattached garages, reports that is takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the red barn model. Assume the assembly times

    asked by Jade
  130. algebra

    On three consecutive passes, a football team gains 6 yards, loses 36 yards, and gains 16 yards. What number represents the total net yardage?

    asked by Ed
  131. Math

    In 1920, the record for a certain race was 46.6 sec. In 1980, it was 45.4 sec. Let R(t)= the record in the race and t = the number of years snce 1920. a) Find a linear function that fits the data R(t) = b) Use the function in (a) to predict the record in

    asked by Liz
  132. algebra

    The function H described by H(x) =2.75x+71.48 can be used to predict the height, in centimeters, of a woman whose humerus (the bone from elbow to the shoulder) is x cm long. Predict the height of a woman whose humerus is 32 cm long.

    asked by Ed
  133. algebra

    find the equation for x x-11 1/2 = 11 1/12

    asked by Anonymous
  134. math

    What is the height of an equilateral triangle that has sides of length 1 cm?

    asked by Sarah
  135. chemistry

    by the way, how can you tell if work is 0 for 2 mol of solid iron (C = 25:1 J/(molK)) is heated from 20C to 200C. How much does its internal energy change?

    asked by eng
  136. 11th grade

    log5(1+.03%)

    asked by Anonymous
  137. grammar

    check if they are right 1. red hots and candy corn (is,are)johns favorite candy. (is) 2. neither Alex nor the rest of the group (is,are) interested in the trip. (are) 3. both benny and jerry (dislikes,dislike)winter. (dislike) 4.fruits and vegetables

    asked by Sara
  138. Math (Geometry)

    A rectangle has a perimeter of 12 m. If each side is a whole number of meters, what are the possible dimensions for the length and width? List them and explain your answer.

    asked by Sammi
  139. English

    I need a good hook for an essay. The essay's about being a peer for the children at my school who are mantally disabled. My 1st paragraph is about what I do in the class, 2nd is about the kids, & 3rd is about special olumpics. Help PLEASEE!!!??

    asked by Cecilia
  140. Child Care Management

    I have a questions that I have answered If some one could just check it Thanks. Neuron development and elaboration, which occurs between birth and age 10, is prompted by A.aural prompts from the family,school, and enviroment. B.physical movement on the

    asked by Barb
  141. social studies

    how did egypts social pyramid shape life in the new kingdom?

    asked by ilynisha
  142. poetry

    want to write a poem about vehicle

    asked by Anonymous
  143. Chemistry

    I am asking for the balanced equation for NaOH and ammonium chloride. And what what gas is given off with this two react when heated.

    asked by Gillian
  144. physics

    the melting temperature of magnesium is 650c what is the melting temperature of magnesium in fahrenheit

    asked by Anonymous
  145. statistics

    In hypothesis testing, why are verbal problem statements converted to numerical problem statements? Why is it important to identify the parameter when converting a problem statement from verbal to numerical? Why do a null and alternative hypothesis have to

    asked by pebbles
  146. Math

    Show that Euler’s formula holds for the polyhedra described in A right pentagonal prism

    asked by Anonymous
  147. physics

    A circular conducting hoop of wire has a constant magnetic field |~B | = 1.7 Tesla passing through it so that the field direction is perpendicular to the plane of the hoop. There is an EMF induced in the hoop with magnitude 2.6 Volts because the hoops area

    asked by joshua
  148. science

    A skater is coasting alone the ice without sexerting any apparent force. Which law of motion explains the skater's ability to continue moving?

    asked by Summer
  149. physics

    a 2400-lb (=10.7-kn)car traveling at 30 mi/h (=13.4m/s)attempts to round an unbanked curve with a radius of 200ft (=61.0m).(a) what force of friction is required to keep the car on its path?(b) what minimum coefficient of static friction between the tires

    asked by Anonymous
  150. general chemistry

    The red line in the hydrogen line spectrum corresponds to to which electron transition?

    asked by Max
  151. Math!

    A store receive an invoice for $1773.75 dated January 23 with terms 3/10, 1.5/25, n/45. a) What is the balance after a payment of $1250 on Februray 2? 1250/(1-.03)=1288.66 1288.66-1773.75=485.09 Answer for (a)$485.09 b) What additional payment on February

    asked by Thara!
  152. windows XP

    On a shared folder, Read permission allows a user to display folder names, filenames, file data, and attributes; run program files; and change folders within the shared folder. True or false?

    asked by josh
  153. algebra

    Katie is finding the standard form of the equations y = x2 + 6x + 4. What mistake did she make in her work? Show the correct answer.

    asked by rattler
  154. algebra

    150/-15 divide if possible

    asked by dora
  155. algebra

    use multiplying by one to find and expression equivalent to 16/5 with a denominator of 15y. type as a fraction

    asked by bella
  156. algebra

    graph 9/4

    asked by bella
  157. Computer Science

    Using the operations push(E obj), peek(), pop(), empty() give a Java implementation of the method // Reverses the elements in the stack //and returns the result. // The stack passed as an argument to //reverse() will be // destroyed upon return. public

    asked by Rob
  158. algebra

    m = n-16 solve for m

    asked by ariel
  159. Math (Analysis)

    Suppose that A has exactly three elements and B has exactly two. How many different functions are there from A to B? How many of these are injective? How many are surjective?

    asked by Anonymous
  160. Math!

    A store receive an invoice for $1773.75 dated January 23 with terms 3/10, 1.5/25, n/45. a) What is the balance after a payment of $1250 on Februray 2? 1250/(1-.03)=1288.66 1288.66-1773.75=485.09 Answer for (a)$485.09 b) What additional payment on February

    asked by Thara!
  161. Word Problem

    Measuring Trees Problem. Jared wants an estimate of the height of some of the trees near his lake house. Use ideas of size transformations to design a plan for him to use his height to estimate accurately a tree’s height without directly measuring the

    asked by Anonymous
  162. English

    Hi, I am writing an essay and I noticed that I am using "but, however, and instead" constantly. I was wondering if you know any other similar words I could use.

    asked by Anonymous
  163. his 135

    Describe the social structure and lifestyles of the 1960’s Counterculture. How did the Vietnam War influence the Counterculture? Do you think there is a counterculture today?

    asked by brandi nicole HELPPPPPP please!!!
  164. Biology

    Hi there, Could you help me come up with four arguments as to why xenotransplantation should not receive all the funding that stem cell research now receives. Sabrina

    asked by Wayne
  165. college govt 2302

    what was the summary of Federalist paper no. 10 by james madison?

    asked by jennifer
  166. Chemistry

    What is the wavelength of radiation that has a frequency of 5.8 X 10^12 s-1? I keep getting 5.17e19 but it keeps saying that's wrong. Help!

    asked by Janie
  167. Com/220

    My topic is Affects Of Gun Control on Teenagers.What Introduction and Conclusion do I start with

    asked by Phonexi
  168. Math questions

    What are some examples of regular polyhedra? What are some examples of other important polyhedra? What characteristics help you determine whether a polyhedron is regular or irregular? How can you check for symmetry and rotational symmetry of polyhedra?

    asked by Anonymous
  169. math214

    Find 28° 29’ 46” - 16° 48’ 59’’

    asked by Anonymous
  170. English

    Can you, writeacher, please tell me if the following statements are correct? 1)The mirror spends its time looking at the opposite wall. The only time when he changes his observation (can you suggest to me a better word?) is when a woman bends over it to

    asked by Franco
  171. Geometry

    a line has the equation 2x + 5y = 7. another line passes through (3,6) and (k,9). what value for "k" will make the lines parallel? please tell me HOW to do this, too! thanks!

    asked by Katherine
  172. Math

    Three planes: x+y-2z=1 2x+z=y-4 -3x-y+z=-2 They intersect at: (a) (-2/5,5,9/5) (b) no common intersection (c) r=(5/3,-2/3,0)+&(1,5,3) (d) r=(0,-4,-5)+%(1,5,3) &/%=signs like alpha and beta, used in vector eqns Please help! I just can't get the answer to

    asked by Anonymous
  173. health

    a pretrail conference most likely would occur

    asked by Anonymous
  174. govt 2302

    i have read the summary of federalist paper no 10 but im still not understanding madisons stand on the constitution. does he favor it?

    asked by jennifer
  175. College Math!

    A store receive an invoice for $1773.75 dated January 23 with terms 3/10, 1.5/25, n/45. a) What is the balance after a payment of $1250 on Februray 2? 1250/(1-.03)=1288.66 1288.66-1773.75=485.09 Answer for (a)$485.09 b) What additional payment on February

    asked by Thara!
  176. personal finance

    Tax-deffered retirement plans a type of: a)exemption b)itemized deduction c)passive income d)tax shelter Is C CORRECT ANSWER?THANK YOU:)))

    asked by vedrana
  177. Physics

    what is the weight of a 10kg object on the moon if it is 1/6 that of the earth?

    asked by Eric
  178. government 2302

    what would you say the main difference between a republican and a democratic is? thank you for the help ms sue!! :)

    asked by jennifer
  179. Pre-Cal

    sqrt2 /10 Do I just leave this as sqrt2/10 or can I reduce it to sqrt1/5?

    asked by Abbey
  180. govt 2302

    do you think being a conservative democrat contradicts itself?

    asked by jennifer
  181. Math

    How do you show 33/100 as a reduced fraction? The answer choice is suppose to be approximately.

    asked by Terri
  182. Writng and imaging

    I need a picture to represent these thing but its confusing. 1) Society 2) Being Chosen 3) Being Judge or Characterized by race or money

    asked by Laly
  183. Math

    Find the slope, if it exists. 60x-40y+15=0. I'm stumped on this problem Could someone please help.? Thanks.

    asked by B.B.
  184. Scince

    What is hidrogen?

    asked by Hannah
  185. chemistry

    how many joules of heat are used in raising temp of 25 g of water from 20 to 35 degrees celcius

    asked by jill
  186. Math

    How do I show 33/100 = 1/3, step by step?

    asked by Terri
  187. algebra

    y=.09(sq)-x+11.5 need to find y if x=10

    asked by val
  188. Physics

    If two resistors are connected in parallel, I know that they share the same voltage but how would you determine their current?

    asked by Sandra
  189. Math

    A store receive an invoice for $1773.75 dated January 23 with terms 3/10, 1.5/25, n/45. a) What is the balance after a payment of $1250 on Februray 2? 1250/(1-.03)=1288.66 1288.66-1773.75=485.09 Answer for (a)$485.09 b) What additional payment on February

    asked by Thara!
  190. TRIG MATH

    If sin theta= -7/8, then the value of 1/cot theta in the interval 3pi/2

    asked by Tye
  191. math

    What is the least common denominator of the rational expressions x-1/x^2+8x+7 and -3/x^2+x

    asked by Anonymous
  192. Maths

    The line r=(2,3,4)+µ(-1,0,3) and the point (6,0,2) form which plane: (a) r.(-1,0,3)=10 (b) r.(9,10,3)=60 (c) r.(2,3,4)=29 (d) r=(2,3,4)+µ(-1,0,3)+ù(6,0,2) Please help!!! Thanks!

    asked by Anonymous
  193. classroom instruction

    how will you teach and talk to students about the war? this is what i said How I would teach my class about a war is have a Veteran come in that was from the war. Before the veteran came into the class to answer any questions that the students may ask, the

    asked by scooby
  194. Geometry

    Find the perimeter and area of an equilateral triangle with a height of 24in.

    asked by Anonymous
  195. personal finance

    must calculate whether a couple should rent or buy a home.

    asked by don
  196. Algebra

    How do Isolve this, 10q-25q to the 2nd power

    asked by Jayda
  197. math 12 logarithms

    How would I go about proving 1/log a +1/log a = 1/log base 100 a. Any help would be greatly appreciate. Thanks

    asked by sandy
  198. Geometry

    In triangle XYZ,Cos X = 0.4 What is the length of XZ?

    asked by Anonymous
  199. chemistry

    State one method of preparing oxygen in the lab and wrte a balanced equation for the reaction

    asked by +2347034420247
  200. Math(Please check)

    Complete the identity secQ - 1/secQ = secQ Is this correct?

    asked by Abbey
  201. Precalculus(URGENT)

    Number of possible turning points in the following equation f(x)=x^2(x-3)(x+4) show work please

    asked by Arielt
  202. chemistry

    how many moles are in a 65L sample of chlorine gas at 10degrees Celcius?

    asked by molly
  203. algebra

    The equation y =-1777+27,153 can be used to predict the number y of gun deaths in the United States x years after 2000, that is, x=0 corresponds to 2000, x=2 corresponds to 2002, X=6 corresponds to 2006, and so. Predict the number of gun deaths in 2006 and

    asked by Ed
  204. science

    explain what causes lightning and thunder.

    asked by danaejah
  205. math

    A TV reporter said that twice as many woodlands were lost this year to fire than in the preceding year. He claimed this was an increase of 200%. Was he correct?

    asked by kevin
  206. Vocab for cultures & devel

    sentence for homogeneous

    asked by Stacey
  207. Math 98 pre algebra

    14 and 2/3 times 2 and 2/11 divided by 3 and 3/8. i got =234 and 1/4 am I correct and if not what is the answer?

    asked by chris
  208. vocab cultures & dev

    a sentence with the word communist in it

    asked by Stacey
  209. pre alg

    (-4)cubed divided by (-2)cubed -3(-5)squared I got -67 am i correct?

    asked by trev
  210. pre algbra

    3x(cubed)times y, -2xy(cubed), -5x, how many terms do you see and what is the product of their coefficients?

    asked by me again
  211. pre algebra

    last question, the number of students rose from 6300 in 2004 to 8505 in 2005 what is the % increase?

    asked by me again
  212. Biology

    Need help with these--- 14. Which of the following is present in an insect but not in arachnids? a. mandibles b. compound eyes c. jointed appendages d. segmentation 16. The exoskeleton of an insect a. does not have any muscles attached to it b. is moved by

    asked by mysterychicken
  213. Precalculus

    Number of possible turning points in the following equation f(x)=x^2(x-3)(x+4) are there 2 turning points or three turning points on the graph

    asked by Arielt
  214. Accounting

    FIN 200 Checkpoint: break even analysis

    asked by Chris
  215. physics

    two charged objects carry a negative charge of 2*10c. calculate their distance apart

    asked by innocent
  216. science

    The speed of a rain is reduced unformly from 10m/s to 5m/s while covering a distance of 50m.What is its acceleration??

    asked by chen chen
  217. psychology

    Explain how having a negative self-schema affects one’s social interactions. How does social intelligence affect one’s responses in any given situation? How might a person’s self-guides affect his or her perspective of the world?

    asked by shelly
  218. hum 130

    What are some of the new developments in the Islamic world? Select at least two and describe them.

    asked by john
  219. biology

    Why is cell culture one of the most valuable technical achievements in the entire study of biology?

    asked by alex
  220. 5th grade Math

    A rectangle has a perimeter of 12 m. If each side is a whole number of meters, what are the possible dimensions for the length and width? List them and explain your answer.

    asked by Sammi
  221. 10th grade

    what chemicals are being added together in the chemical equation of 2HCL + Ca -> CaCl2 + H2

    asked by maddi
  222. science

    what type of interaction occurs between organisms fighting for same resources?

    asked by sara