April

Most popular questions and responses by April
  1. Math

    The ratio of red jelly beans to yellow jelly beans in a dish is 3:4. if greg eats 3 red jelly beans and 6 yellow ones, the ratio is 4;5. how many jelly beans were originally in the dish?

    asked on September 10, 2012
  2. history

    Why, when, and where did Abraham Lincoln say "What kills a skunk is the publicity it gives itself." ? Thanks. Since this is not my area of expertise, I searched Google under the key words "Abraham Lincoln Skunk quote" to get possible sources. I got over 15

    asked on October 15, 2006
  3. chemistry

    In one process of 5.75 kg of CaF2 are treated with an excess of H2SO4 and yield 2.85 kg of Hf calculate the percent yield of hf?

    asked on June 8, 2012
  4. Social studies

    What was the initial purpose of the constitutional convention?

    asked on December 13, 2018
  5. math

    A machine has four components, A, B, C, and D, set up in such a manner that all four parts must work for the machine to work properly. Assume the probability of one part working does not depend on the functionality of any of the other parts. Also assume

    asked on January 24, 2010
  6. English

    For questions 7-10, identify the type of noun underlined in each sentence. 7. The AZTECS made sacrifices to their gods. (2 points) Select all that apply. Common. Proper. Compound. Collective. 8. A SWARM of insects surround the raft as we drifted down the

    asked on September 16, 2015
  7. physics

    suppose a .3 kg mass on a spring that has been compress .1 m has elastic potential energy of 1 j. how much further must the spring be compressed to triple the elastic potential energy? the answer is .07, but how do i get that?

    asked on February 2, 2009
  8. Physcis 1

    A muscle builder holds the ends of a massless rope. At the center of the rope, a 7.9-kg ball is hung. Each end of the rope subsequently makes an angle of È with the horizontal. What is the tension in the rope if the angle È is 6.0°?

    asked on February 10, 2011
  9. physics

    A horizontal force of 200 N is applied to a 55 kg cart across a 10 m level surface. If the cart accelerates at 2 m/s^2 then what is the work done by the force of friction as it acts to retard the motion of the cart? Hint calculate the force of friction

    asked on February 3, 2009
  10. math

    how many multiples of 7 are there between 100 and 1000?

    asked on May 10, 2011
  11. physics

    A ball is thrown upward with an initial velocity of 13 m/s. At what time does the ball reach the high point in its flight? (Use the approximate value of g = 10 m/s2, and remember that the velocity is equal to zero at the high point.)

    asked on September 18, 2011
  12. Physics

    Starting from rest, a 1.6x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.42 N on it. This force does 3.6x10-4 J of work on the flea. (a) What is the flea's speed when it

    asked on March 12, 2012
  13. Geometry

    Find the missing measure for a right circular cone given the following ... Find h if r = 5 and V = 100 pi.

    asked on May 1, 2012
  14. Math

    Statistics show that the sales force of Golden Wholesalers successfully closed 1,711 sales out of 1,950 sales calls. What was their percent success rate?

    asked on May 30, 2013
  15. Science

    An electric light is plugged into a 120-V outlet. If the current in the bulb is 0.5 A, how much electrical energy is used by the bulb in 15 minutes?

    asked on March 4, 2016
  16. Language Arts

    Can you check my answer? Matt hiked the trail yesterday. It made him tired. Which sentence combines the two sentences using a gerund phrase? A- hiking the trail yesterday made Matt tired B- Matt hiked the trail and it made him tired. My answer C-It made

    asked on May 12, 2016
  17. Algebra

    Suppose that the number of bacteria in a certain population increases according to a continuous exponential growth model. A sample of 1800 bacteria selected from this population reached the size of 2272 bacteria in five hours. Find the hourly growth

    asked on August 4, 2017
  18. chemistry

    Calculate the mL of 2.00 M H2SO4 required to neutralize 50.0 mL of 1.00 M KOH? consider that H2SO4 has two acidic hydoregens H2SO4(aq) +2KOH(aq)---->K2SO4(aq) + 2H2O(l)

    asked on February 6, 2012
  19. chemistry

    Given the following equations: 2 H2O2 (aq) → 2 H2O (l) + O2 (g) and C2H4 (g) + 3 O2 (g) → 2 CO2 (g) + 2 H2O (l) The first reaction is the decomposition of hydrogen peroxide into water and oxygen gas. The oxygen gas generated in the first reaction is

    asked on July 1, 2018
  20. statistics

    A sign on the gas pumps of a chain of gasoline stations encourages customers to have their oil checked, claiming that one out of four cards need to have oil added. If this is true, what is the probability of the following events? a. One out of the next

    asked on March 17, 2016
  21. Math

    Jimmy has finished pouring 900 cubic feet out of a total of 4,400 cubic feet of concrete. What percent of the job has she completed?

    asked on May 30, 2013
  22. Geometry

    A cone with a radius of 3 inches has a total area of 24 pi sq in. Find the volume of the cone.

    asked on April 30, 2012
  23. chemistry:)

    The bond enthalpy of the Br–Cl bond is equal to DH° for the reaction BrCl(g)-> Br(g) + Cl(g). Use the following data to find the bond enthalpy of the Br–Cl bond. Br2(l)--->Br2(g) ÄH=30.91 KJ/mol Br2(g)--->2Br2(g) ÄH=192.9 KJ/mol Cl2(g)---->2Cl(g)

    asked on June 9, 2012
  24. health part2

    The sole activity of the respiratory system is breathing. True False The exchange of gases between the blood and tissue cells is external respiration. True False Air flows in the process of pulmonary ventilation because of pressure differences between the

    asked on March 28, 2015
  25. math

    Jessie has a box of 1000 marbles . He has 75 yellow , 230 red, 331 blue and 364 green what fraction of his marbles are yellow? What fraction of his marbles are ref?

    asked on September 2, 2014
  26. Business management class

    1. Americans are often accused of being ethnocentric. This means that A. Americans welcome diversity in their work force. B. Americans feel their culture is superior to other cultures. C. U.S. firms are actively seeking international markets. D. U.S.

    asked on January 30, 2012
  27. statistics

    For which of the following would it be most appropriate to use an ANOVA to analyze the data? A. A researcher is interested in determining the most effective format for advertising. He randomly assigns 60 people to one of three groups: (1) television

    asked on April 27, 2014
  28. MATH

    Please help check my answers to make sure they are correct. I used the "sinking fund payment and present value of an ordinary annuity" formulas to solve this story problem. Thanks! Story: Naomi Dexter is 20 years old. She decides to investigate several

    asked on March 6, 2011
  29. chemistry:)

    The bond enthalpy of the Br–Cl bond is equal to DH° for the reaction BrCl(g)-> Br(g) + Cl(g). Use the following data to find the bond enthalpy of the Br–Cl bond. Br2(l)--->Br2(g) ÄH=30.91 KJ/mol Br2(g)--->2Br2(g) ÄH=192.9 KJ/mol Cl2(g)---->2Cl(g)

    asked on June 6, 2012
  30. Physics

    A car slams on its brakes, coming to a complete stop in 4 sec. The car was traveling north at 60 mph. Calculate the acceleration

    asked on September 13, 2010
  31. Math

    What is the percent markup based on cost for the shirts in the previous question? (Round percent to the nearest tenth.) I got .72% What is the percent markup based on selling price for the Western Wear shirts? (Round percent to the nearest tenth.)

    asked on June 1, 2013
  32. Math

    Comparing Fractions Writing to explain James says that 5/5 is greater than 99/100. Is he correct? Explain.

    asked on March 5, 2013
  33. physics

    1. a 2 kg body is attatched to a spring of negligible mass and oscillates with a period of 1.00 s. The force constant of the spring is? 2. The force constant of a massless spring is 25 N/m. A mass of .45 kg is oscillating in simple harmonic motion at the

    asked on February 4, 2009
  34. Math

    Use properties of logarithms to rewrite the expression. Simplify the results if possible. Assume all variables present positive real numbers. Log6(7m+3q)

    asked on March 14, 2017
  35. Geometry

    Find the missing measure for a right circular cone given...Find r if T.A.= 12 pi and L.A = 8 pi.

    asked on May 1, 2012
  36. Math 6th grade

    At lunch 3 1/4 small pizzas were equally devided into 4 people one person eats 1/4 of what he was given how much of a whole pizza did that person eat

    asked on December 10, 2014
  37. math

    The probability of getting a white marble from a bag is 1/5. If there are 37 white marbles in the bag, what is the total number of marbles in the bag

    asked on February 12, 2015
  38. English

    The following items are run-on sentences. Revise each item either by making two complete sentences, or by adding a conjunctive adverb or semicolon. Change the punctuation and capitalization as necessary. Make all corrections on the sentences below. I was

    asked on December 16, 2012
  39. Physics

    A wire of thickness d = 5 mm is tightly wound 200 times around a cylindrical core to form a solenoid. A current I = 0.1 A is sent through the wire. What is the magnetic field on the axis of the solenoid?

    asked on March 5, 2013
  40. Physics

    A block of mass M1=2.9 kg rests on top of a second block of mass2=5.5 kg, and the second block sits on a surface that is so slippery that the friction can be assumed to be zero. Question: (a) if the coefficient of static friction between the blocks is

    asked on March 2, 2012
  41. Math

    Alice and Bill are planning to have three children. (Assume that it is equally likely for a boy or a girl to be born.) What is the probability that not all three will be of the same gender?

    asked on April 11, 2019
  42. Chemistry

    A 11.0-mL sample of an unknown H3PO4 solution requires 116mL of 0.140 KOH to completely react with the H3PO4. What was the concentration of the unknown H3PO4 solution (answer in M). H3PO4(aq) + 3KOH(aq) --> 3H2O(l) + K3PO4(aq)

    asked on July 23, 2014
  43. chemistry

    what is the pH of coffee if the [H3O+] is 1*10^-5 M?

    asked on February 5, 2012
  44. Math

    Please help check my answers to make sure they are correct. I used the "sinking fund payment and present value of an ordinary annuity" formulas to solve this story problem. Thanks! Story: Naomi Dexter is 20 years old. She decides to investigate several

    asked on March 7, 2011
  45. Integers

    A decrease in 250 attendees

    asked on October 8, 2019
  46. Math

    luc has 1 h of homework to do. He has assignments to complete for social studies and math, and a science test. he sepends 2/5 of the time completing the social studies assignment, and 1/3 of the time on math. How much time does Luc have left to study for

    asked on October 13, 2014
  47. Civics

    what preamble goal is fulfilled when amendments are added to the constitution?

    asked on October 17, 2019
  48. statistics

    At the beginning of the semester, students who registered for a statistics course were randomly assigned to two sections, each taught by a different instructor. At the end of the semester, we would like to test whether there are differences in performance

    asked on May 1, 2014
  49. Chemistry

    At 20.0 degrees celcius, a student collects H2 gas in a gas collecting tube. The barometric pressure is 755.2mm Hg and the water levels inside and outside the tube are exactly equal. What is the total gas pressure in the gas collecting tube?

    asked on February 18, 2013
  50. Algebra and Trig

    Aldo has feet of fencing. He will use it to form three sides of a rectangular garden. The fourth side will be along a house and will not need fencing. What is the maximum area that the garden can have?

    asked on March 10, 2011
  51. physics

    An empty rubber balloon has a mass of 0.0100 kg. The balloon is filled with helium at a density of 0.181 kg/m3. At this density the balloon is spherical with a radius of 0.300 m. If the filled balloon is fastened to a vertical line, what is the tension in

    asked on December 20, 2010
  52. Math

    A square with a side length of 2s has a smaller square inscribed. The vertices of the smaller square are at the midpoints of the sides of the larger square. What is the ratio of the larger square to the area of the smaller square? Express your answer in

    asked on February 10, 2015
  53. statistics

    Most Americans, 75% in fact, say frequent handwashing is the best way to fend off the flu. Despite that, when using public restrooms, women wash their hands only 67% of the time and men wash only 46% of the time. Of the adults using the public restroom at

    asked on September 26, 2013
  54. business math please help me

    An invoice is dated August 29 with terms of 4/15 EOM. What is the discount date? (Points What is the net date for the scenario in the previous question? (Points : 2.5)

    asked on May 30, 2013
  55. chemistry

    In my experiment I placed NaCl in glycerin for 10 minutes or more and it did not dissolve. I have looked to see if glycerin is polar or nonpolar and the information uses glycerol and glycerin interchangeably, yet they are not the same. Some information

    asked on May 8, 2012
  56. physics

    A 7.4kg block starts 1.2m above the ground, at the top of a frictionless ramp. At the bottom of the ramp is a flat stretch of rough (μk = 0.15) ground 3.0m long. After sliding 3.0m, the ground becomes frictionless, and the block hits a spring (k =

    asked on October 24, 2016
  57. Civics

    What is the main difference between an amendment to the Virginia and us constitution?

    asked on October 17, 2019
  58. Math

    Amanda says her quilt has 9 equal parts. Jeremy says it has 3 equal parts. Can they both be correct? Explain.

    asked on January 29, 2013
  59. Math

    You play a gambling game with a friend in which you roll a die. If a 1 or 2 comes up, you win $8. Otherwise you lose $2. What is your expected value for this game?

    asked on April 29, 2019
  60. Chemistry

    1. As I understand it--As an acid is added to neutral water the (OH-) will...decrease?? Is this right? 2. If you made up a solution of NaOH by adding 0.010 mole of solid NaOH to 1.0 L of distilled water, what would be the concentration of the OH-?...I

    asked on May 15, 2012
  61. Chemistry

    What is the concentration of a solution prepared by diluting 25.0 mL of HCL 0.750 mol/L to a final volume of 500.mL?

    asked on April 30, 2008
  62. Science

    A hollow iron cube has measures 5cm on each side and has a mass of 20g will the iron cube sink or float?

    asked on September 10, 2015
  63. 12th grade (physics)

    a car with bad shock absorbers bounces up and down with a period of 0.731s after hitting a bump. The car has a mass of 1850kg and is supported by four springs of equal force constant k. Determine a value for k. Answer in units of N/m. if you can, could you

    asked on October 28, 2010
  64. Multiplicative inverse

    Angelo says that if you know one unit rate in a proportional relationship, the other unit rate is always the multiplicative inverse of the unit rate you know. Is Angelo correct? Explain

    asked on April 10, 2016
  65. algebra

    A cubic polynomial function f(x) has leading coefficient -2 and intercepts the y-axis at 2. If f(1)=1, and f(-2)=-2, find f(-1) and write the complete function.

    asked on April 6, 2015
  66. physics

    A ball of mass 0.075 kg is fired horizontally into a ballistic pendulum. The pendulum mass is 0.350 kg. The ball is caught in the pendulum, and the centerof mass of the system rises a vertical distance of 0.145 m in the earth's gravitational field. What

    asked on March 28, 2010
  67. Math

    Your annual starting salary is $50,247. After working for a few years, you start to get yearly raises. If you get a 0.6% raise a total of 4 times and then a 1.6% raise a total of 6 times, what is your salary after all the raises?

    asked on September 6, 2019
  68. math

    On a map, 1 inch equals 20 miles. Two cities are 135 miles apart. What is the distance between the two cities on the map?

    asked on May 2, 2017
  69. Math

    Laurie and Anna are running a 3 mile race. After 5 minutes, Laurie has run 3/5 miles and Anna has run 7/10 mile. If both ladies can keep their same pace for the remainder of the race, how many minutes ahead of Laurie will Anna cross the finish line?

    asked on April 10, 2016
  70. Business management class

    In general, a person who owns and operates his or her own business can be thought of as a/an A. entrepreneur. C. gambler. B. manager. D. pioneer. my answer is A Consider two used-car dealers: Bob’s Better Wheels and Dewey, Cheatum, and Howe Motors. Their

    asked on January 30, 2012
  71. Math

    Drinking 8 fluid ounces of milk provides 270.0 milligrams of calcium. How many fluid ounces of milk provide 72.5 milligrams of calcium? Round to the nearest tenth.

    asked on April 8, 2014
  72. Math

    Stillwater hospital is borrowing $1,000,000 for its medical office building. The annual interest rate is 5 percent. What will be the equal annual payments on the loan if the length of the loan is four years and payments occurs at the end of each year?

    asked on August 3, 2013
  73. CHEMISTRY

    Predict the products of the following reactions. a)CH3-CH2-CH2-CH3+O2----> B)CH3-CH2-CH2-CH2-CH3+Br2----> c)CH3-CH=CH-CH3+Br3----> D) HEXENE+KMnO4--> E) HEXENE+Br2---->

    asked on February 19, 2012
  74. chem 101

    How many milliliters of 0.205 M NaOH solution are needed to completely neutralize 5.50 mL of 0.865 M H2SO4 solution?

    asked on July 23, 2015
  75. math

    The unit rate of 7/12 liters in 3/10 kilometers

    asked on February 20, 2014
  76. Physics

    Which of the following is correct for a step-down transformer?

    asked on May 31, 2013
  77. physics....

    1) In one scene of the movie Raiders of the Lost Ark, Indiana Jones is running along the top of a moving train. He is running at a speed of 10 km/h, relative to the train. The train is moving at a speed of 100 km/h, relative to the ground. Draw a rough

    asked on June 14, 2012
  78. Law

    Discuss some of the possible motivations of a white-collar criminal. Why would the CEO of a Fortune 500 company embezzle money? In addition, discuss some strategies you would suggest as a business's security manager to discourage white-collar crime. Can

    asked on March 26, 2008
  79. Physics

    which statement is true concerning the interference pattern from a double slit experiment? a) the dark fringes appear equally spaced b) the dark fringes increase spacing farther from the center line. c) the spacing of the bright fringes is twice that of

    asked on January 7, 2018
  80. math

    The distance an automobile can travel in h hours at an average rate of 50 miles an hour is found y the formula d=50h. Problem: A car was driven for 3 hours. The driver then stopped 3/4 of an hour for lunch. After lunch he drove for 2 and 1/2 hours, then

    asked on June 17, 2010
  81. math

    A police department reports that the probabilities that 0,1,2, and 3 burglaries will be reported in a given day are .51, .44, .04, and .01, respectively. Find the expected number of burglaries reported in a given day. How do I figure this out? I simply do

    asked on January 24, 2010
  82. chemistry

    Determine whether a reaction will take place in the following and write a complete balanced equation: You must include phase labels. Use NR for no reaction. 1.) Ca(OH)2 (aq) + Al(NO3)3 (aq) → 2.) Cu(C2H3O2)2 (aq) + Na2SO4 (aq) → 3.) H2SO4 (aq) + KOH

    asked on July 1, 2018
  83. Math Grade 7

    To improve her cardiovascular capacity,Mia wants to increase the distance she walks each day. She now walks 1/2 mile in 8 1/2 minutes. If Mia keeps the same pace, will she be able to walk 1 1/2 miles in less than 1/2 hour?

    asked on April 10, 2016
  84. Algebra 2

    A box with no top is to be constructed from a piece of cardboard whose length measures 12 inches more than its width. the box is formed by cutting squares that measures 4 inches on each sides from 4 corners and then folding up the sides. If the volume of

    asked on March 15, 2013
  85. CHEM:

    The bond enthalpy of the Br−Cl bond is equal to ƒ¢H‹ for the reaction BrCl(g) ¨ Br(g) + Cl(g). Use the following data to find the bond enthalpy of the Br−Cl bond. Br2(l)--->Br2(g) ƒ¢H=30.91 KJ/mol Br2(g)--->2Br2(g) ƒ¢H=192.9 KJ/mol

    asked on June 6, 2012
  86. physics

    waves on the surface of a liquid are observed to have a wavelength of 12.9 mm and a speed of 30.9 cm/s. the frequency of the wave motion is: a. 1.8 mHz b. 24 Hz c. 42 mHz d. 2.4 Hz e. 2.4 mHz how do i know which label to use (mHz or Hz)? and which one is

    asked on February 10, 2009
  87. physics

    On his way off to college, Russell drags his bag 15.0 m from the door of his house to the car at a constant speed with a horizontal force of 95.0 N. How much work does Russell do to overcome the force of friction?

    asked on February 4, 2009
  88. spanish

    What is the difference between a direct and indirect object pronoun? Thank you for using the Jiskha Homework Help Forum. Do you need the explanation first in English? The direct-object: a word or phrase denoting the goal or the result of the action of a

    asked on January 16, 2007
  89. Concepts in number sense

    An odd number whose thousands digit is twice its hundreds digit

    asked on September 13, 2016
  90. Maths

    Prove (cosecθ-cotθ)^2=1-cosθ÷1+cosθ

    asked on August 23, 2016
  91. Math

    Draw the line through the point (4,5)that is parallel to the y-axis. Write the equation of this line and state its slope. Can anyone assist me. The example or instructions is not in my text.

    asked on October 5, 2015
  92. health part2

    The sole activity of the respiratory system is breathing. True False The exchange of gases between the blood and tissue cells is external respiration. True False Air flows in the process of pulmonary ventilation because of pressure differences between the

    asked on March 28, 2015
  93. statistics

    A professor is interested in the relationship between the number of hours students study for a quiz and their quiz grades. She asked each student to record the number of hours that he/she studied for the final exam. She also recorded the students’ grades

    asked on April 29, 2014
  94. Math

    An invoice is dated August 29 with terms of 4/15 EOM. What is the discount date? What is the net date for the scenario in the previous question?

    asked on May 26, 2013
  95. Physics

    A 8.22 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 16.8 N. Find the speed of the block after it has moved 2.3 m. Answer in units of m/s

    asked on December 28, 2011
  96. physics

    What speed would a fly with a mass of 0.71 g need in order to have the same kinetic energy as a 1250 kg automobile traveling at a speed of 11 m/s?

    asked on December 1, 2011
  97. math

    Ann is five years older than twice her brother Dan's age, a. Write an algebraic expression to represent the sum of their ages.

    asked on November 9, 2010
  98. Intro to business

    the resurgence of us manufacturing firms in recent years can be credited to

    asked on October 19, 2010
  99. math

    The distance an automobile can travel in h hours at an average rate of 50 miles an hour is found y the formula d=50h. Problem: A car was driven for 3 hours. The driver then stopped 3/4 of an hour for lunch. After lunch he drove for 2 and 1/2 hours, then

    asked on June 17, 2010
  100. physics

    a 200 kg block was moved along an inclined plane to a height of 10m. during this process 3000J of energy was lost due to friction. a. calculate the efficiency of the inclined plane. b. what would the efficiency of the simple machine be if the incline were

    asked on January 31, 2009

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