jean

Newest questions and responses by jean
  1. English

    My apple trees will never get across. Which figure of speech is this??

    asked on March 28, 2018
  2. chem

    A sample of iron absorbs 71.1 J of heat, upon which the temperature of the sample increases from 21.5°C to 28.8°C. If the specific heat of iron is 0.450 J/g-K, what is the mass (in grams) of the sample?

    asked on March 25, 2018
  3. chem

    The value of ΔH° for the reaction below is -1107 kJ: 2Ba (s) + O2 (g) → 2BaO (s) How many kJ of heat are released when 5.75 g of BaO (s) is produced?

    asked on March 25, 2018
  4. AP Statistics

    I was sick and when I came back to school I received this question as homework and I don't understand it... Jenny is a 60 percent free-throw shooter She gets to shoot a second free throw if and only if she makes her first shot. She can score 0 points( if

    asked on January 2, 2018
  5. Maths

    The formula for a simple interest rate is I = PRT and Total Balance = P + I The formula for compound interest is B = P × (1 + 〖r/n)〗^nt Adam invests £55,000 at interest rate of 4% per annum

    asked on December 20, 2017
  6. Chemistry

    An unknown element Q has two known isotopes: 60Q and 63Q. If the average atomic mass is 62.0 amu, what are the relative percentages of the isotopes?

    asked on October 26, 2017
  7. statistics

    Car seat belts are tested for strength, and it is found the results are normally distributed with a mean of 2400 lb and a standard deviation of 400 lb. Using the 68-95-99.7 rule, find the percentage of scores between 1600 lb and 3200 lb.

    asked on August 5, 2017
  8. physics

    the rate at which radiant energy from the sun reaches the earth's upper atmosphere is about 1.50kW/m2. the distance from the earth to the sun is 1.50*10^11m, and the radius of the sun is 6.96 * 10^8m. if the sun radiates as an ideal black body (e=1), what

    asked on May 7, 2017
  9. Math

    In a survey of students about favorite sports the results include 23 who like tennis 24 like football 7 like tennis and football 20 like football and baseball 5 like all three sports 9 like no sports. How many students like only tennis and football? How

    asked on October 1, 2016
  10. chemistry

    Consider the equilibrium reaction CO(g)+H2O(g)⇋CO2(g)+H2(g) Determine how each change in the left-hand column will stress the system and in which direction the equilibrium reaction will shift in response.

    asked on April 18, 2016
  11. physics

    How much effort force would be needed to roll a barrel with a resistance force of 100N up an inclined plane with a height of 2m and an inclined plane of 8m?

    asked on January 22, 2016
  12. Statistics

    what is the standard deviation for 57,61,57,57,58,57,61

    asked on January 10, 2016
  13. precalc

    Find the standard form equation for each ellipse described. 1) Major vertices at (0, 3) and (0, -3), minor vertices at (2, 0) and (-2, 0) 2) Major vertices at (7, 0) and (-7, 0), foci at (5, 0) and (-5, 0) 3) Minor vertices at (-2, -3) and (-2, -11), foci

    asked on December 8, 2015
  14. Intro to Ecology

    Global estimates of denitrification in terrestrial ecosystems vary widely but are of the order 200*102 g/yr, and more than half of that total occurs in wetland ecosystems. If restoration results in an increase in wetland area by approximately 25%, it would

    asked on October 20, 2015
  15. math

    7x-3y+4z=18 13x+6y+8z=30 11x-9y-12z=16 Find x,y,z please show the solution pleaseee

    asked on October 4, 2015
  16. statistics

    A multiple-choice quiz has 15 questions, each with 4 possible answers of which only 1 is the correct answer. What is the probability that a student gets 7 to 11 correct answer?

    asked on September 10, 2015
  17. Solid Mensuration

    A triangle has a base of 16 inches and an altitude of 8 inches. Find the dimensions of the largest rectangle that can be inscribed in the triangle if the base of the rectangle coincides with the base of the triangle.

    asked on August 20, 2015
  18. Calculus

    The balloon leaves the ground 80 ft. from an observer and rises vertically upward at 5 ft/s. (a) How fast is the balloon receding from the observer after 12 seconds? (b) find the corresponding acceleration? How do I sketch it? and what equation should I

    asked on August 12, 2015
  19. Calculus

    A man 5.5 ft tall walks away from a lamp post 10 ft high at the rate of 8 ft/s. (a) How fast does his shadow lengthen? (b) How fast does the tip of the shadow move? Can you please tell me what method/s you used to come up with a solution? I wasn't sure

    asked on August 12, 2015
  20. calculus

    find the equation of the curve for which y'''=24x-6 if the curve passes through (-1,8) and is tangent to the line y=4x at (1,4). help please thanks :-)

    asked on August 11, 2015
  21. calculus

    if the driver of a car wishes to increase his speed from 20 mph to 50 mph while traveling a distance of 528 ft., what constant acceleration should he maintain?

    asked on August 10, 2015
  22. calculus

    a particle starts from rest and moves along a straight line with an acceleration equal to 24-15√t where distance and time are measured in terms of feet and seconds respectively. with what acceleration will the particle return to the starting point? help

    asked on August 10, 2015
  23. calculus

    a stone dropped from a balloon which was rising at the rate of 15 ft./sec. reached the ground in 8 seconds. how high was the balloon when the stone was dropped?

    asked on August 10, 2015
  24. calculus

    If the driver of a car wishes to increase his speed from 20 mph to 50 mph while traveling a distance of 528 ft., what constant acceleration should he maintain?

    asked on August 7, 2015
  25. calculus

    a particle starts from rest and moves along a straight line with an acceleration equal to 24-15√t where distance and time are measured in terms of feet and seconds respectively. with what acceleration will the particle return to the starting point?

    asked on August 7, 2015
  26. calculus

    A stone dropped from a ballon which was rising at the rate of 15 ft./sec. reached the ground in 8 seconds. how high was the ballon when the stone was dropped? please help :-) thank you

    asked on August 7, 2015
  27. calculus

    a parachutist falling at the rate of 15 ft./sec. drops a stone. if he was 904 ft. above the ground when the stone was dropped, how long would it take the stone to reach the ground?

    asked on August 5, 2015
  28. calculus

    a particle moves according to the law a=1/t √t. if s=8 when t=1. and s=16 when t=4. find v when t=9.

    asked on August 5, 2015
  29. SLCS

    Paul and Juston are carrying a sack or rice weighing 6.02x10^2 N on a pole between them. If the pole is 2.0 m long and the load is .50m away from Juston,what force should each boy exert to make it equilibrium. Neclect the weight of the pole.

    asked on August 2, 2015
  30. Math

    Serena is an account executive. She receives a base pay of $18 an hour plus a 15% bonus for all the sales she generates. Last week she generated $1,200 worth of business. What is the minimum number of hours she could have worked to make $500?

    asked on June 30, 2015
  31. Pharmacy Tech

    20.) To find out if a drug causes nausea, you would look in this section of the drug monograph. a) adverse reactions b) contraindications c) how supplied d) warnings I am leaning towards a but not sure..I could also think it could be d as well...am

    asked on April 28, 2015
  32. physics

    a gun converts 200J of stored energy into kinetic energy of the 0.02kg bullet. What is the speed of the bullet as it leaves the gun? If the gun is fired straight up, how high will the bullet go?

    asked on April 24, 2015
  33. math

    solve: 2x + 5 = 3x - 9

    asked on April 4, 2015
  34. Trig

    How do you derive this identity? Cos(t)=1-sin^2(t/2)

    asked on March 11, 2015
  35. calculus

    Use iterated integral to find the area enclosed by r=2sin2(theta). How do i graph this?

    asked on October 15, 2014
  36. calculus

    Z=square root of(x^2+y^2) + xy Find the partial derivatives: x, xx, y, yy, xy. Thanks.

    asked on September 24, 2014
  37. math

    The domain and range of ln(4-x-y). Thanks.

    asked on September 24, 2014
  38. math

    Z=square root of (x^2+y^2) + xy Find the partial derivatives: x, xx, y, yy, xy. Thanks.

    asked on September 24, 2014
  39. math

    The partial derivative with respect to y for z=e^y sin(xy) is: zy= xe^y cos(xy) + e^y sin(xy) How do i get to this answer? Thanks.

    asked on September 24, 2014
  40. math

    Find the rectangle with the maximum area inside the ellipse x^2/16 + y^2/4=1. Thanks.

    asked on September 21, 2014
  41. physics

    If a 2kg car with a momentum of 12kg m/s collides with a stationary 4kg car, the total momentum after the collision will be?

    asked on September 18, 2014
  42. Statistics – Lab Week 2

    11. Using the empirical rule, 68% of male heights should be between what two values? Either show work or explain how your answer was calculated.

    asked on September 12, 2014
  43. physics

    The vertical acceleration of a projectile A)equals g pointing sometimes upwards and other times downwards. B)equals g pointing upwards C)is zero. D)equals g pointing downwards E)continuously increases. Thanks!

    asked on September 11, 2014
  44. physics

    A child, who is 45 m from the bank of a river is being carried downstream by the river's swift current of 1.0 m/s. As the child passes a lifeguard on the river's bank, the lifeguard starts swimming in a straight line until she reaches the child at a point

    asked on September 4, 2014
  45. Math

    If a hallway is 90 feet long & 7 feet wide and it takes 1/2 ounce of cleaning solution to clean 1 square foot, how much cleaning solution is needed to clean the hallway?

    asked on July 10, 2014
  46. physics

    croquet ball must have a set mass of 0.50 kg. a red ball moving at 10.0 m/s, strikes an at-rest green ball head on. The red ball continues moving at 1.5 m/s after it hits the green ball. What is the final speed of the green ball?

    asked on May 15, 2014
  47. Milford DE

    #6 Plot Story map for the other wife

    asked on March 27, 2014
  48. Visual Basic

    Write a statement that assigns the length of an array named strAddressBook to a variable named intAddressCount.

    asked on March 5, 2014
  49. Computers

    Write a statement that assigns the length of an array named strAddressBook to a variable named intAddressCount.

    asked on March 5, 2014
  50. chemistry

    very hot sinc will react with steam to form zinc oxide and hydrogen. If 5.4 liters of hydrogen was used to use up 20 g of zinc completely. What is the percent yield of this process

    asked on February 13, 2014
  51. 20th century Europe

    The 20th century European dominance was replaced by what?

    asked on February 2, 2014
  52. american government

    the professional qualification model in the selection of judges holds that

    asked on January 13, 2014
  53. Business math

    Using the price per dinner that you determined in the previous question, calculate the following. If Epicure offers a $1-off coupon in a newspaper advertisement, what markdown percent does the coupon represent? (Round percent to the nearest tenth.)

    asked on September 13, 2013
  54. Physics

    A rock is ejected vertically upward at 40 m/s. At what time is the rock moving at 20 m/s upward.

    asked on July 1, 2013
  55. algebra

    Question Four x - 7y = 15 -3x + 21y = - 45

    asked on May 30, 2013
  56. economics

    Bob and his dad visited the hardware store on Saturday. They observed the following transactions: Mr. Harris bought 4 for 0.50, Mrs. Clarke bought 21 for $1.00, Mr. Montaro bought 1,134 for $2.00 and Ms. Park bought 450 for $1.50 What were they buying?

    asked on May 19, 2013
  57. American National government

    According to the trustee model of representation, members of Congress must do what

    asked on May 5, 2013
  58. math

    find the value of x in the equation 6x +4(70-x)=300

    asked on April 4, 2013
  59. Intro to Logic

    10. A strongly supported claim in science should be regarded as

    asked on March 30, 2013
  60. math

    simplifying expressions

    asked on February 23, 2013
  61. macro-economics

    1.In an attempt to curb the problem of unemployment and win the forthcoming elections the government of the republic of zambia has decided to hire unemployed workers who had previously been receiving unemployment benefits as government employees and will

    asked on February 13, 2013
  62. political science

    Critically evaluate plato's justification of rule by philosopher kings. Please help its needed the soonest

    asked on February 5, 2013
  63. science

    What is science

    asked on January 28, 2013
  64. chemistry

    balance net Ionic solution AgNo3 + NaOH

    asked on January 26, 2013
  65. political science

    is politics an art or a science? give proper reasons for chosen side.(its an essay)

    asked on January 17, 2013
  66. political science

    what are the argument for and against politics being a science

    asked on January 16, 2013
  67. political science

    Is politics a science or not? Give a reasons for answer

    asked on January 15, 2013
  68. economics

    John has a job that requires him to travel 3 of every 4 weeks. He has an annual budget and can travel either by train or by plaine. The airline on which he typically flies has a frequent traveler programme that reduces the cost of his tickets according to

    asked on January 2, 2013
  69. economics

    John has a job that requires him to travel 3 of every 4 weeks. He has an annual budget and can travel either by train or by plaine. The airline on which he typically flies has a frequent traveler programme that reduces the cost of his tickets according to

    asked on January 2, 2013
  70. Business Math

    Being inventory of 12 sets of paints at a cost of $1.50 each. During the year the store purchased 4 sets at $1.60, 6 sets at $2.20, 6 sets at $2.50, and 10 sets at $3.00. By the end of the year, 25 sets were sold. Caculate the number of paint sets in stock

    asked on December 27, 2012
  71. Business Math

    Lee Corp. purchased 10 key chains on January 1, 2010 for $9.00 each and 5 key chains were purchased on December 1, 2010 for $10.00. Seven were sold. What would be the inventory amount for LIFO, what would be the inventory amount for FIFO

    asked on December 26, 2012
  72. Business Math

    Assume you lease a $45,000 BMW. Using a straight- line method with a 3- year ueful life and is a $16, 675 residual value, what is the book value of the BMW after the first year?

    asked on December 20, 2012
  73. Business Math

    Jim Clinnin purchased a used RV with 19,000 miles for $46,000. Originally the RV sold for $70,000 with a residual value of $20,000. After subtracting the residual value, depreciation allowance per mile was $.86. How much was Jim's purchase price over or

    asked on December 20, 2012
  74. Business Math

    Jim Company bought a machine for $36,000with an estimated lofe of 5 years. The residual value of the machine is $6,000 Calculate (a) the annual depreciation and (b) the book value at the end of year 3. Assume straight-line depreciation

    asked on December 20, 2012
  75. Business Math

    From the following facts, complete a depreciation schedule using thee straight - line cost of Highlander- $30,000 residual value- $6,000 estimated life- 8 years

    asked on December 20, 2012
  76. business

    A usefful personal and business investment site with in-depth detail on personal financial planning. After reading a March 19,2009 , article"Preparing a Portfolio for Retirement," Arlene Supple, 47 years old, is evaluating her retirement portifolio. She

    asked on December 9, 2012
  77. math

    a computer store sold a total of 300 items last month. the store sold six times as amny hard drives as they did CD-ROM drives, andhalf as many floppy drives as hard drives. based on this information, how many of each items were sold

    asked on December 9, 2012
  78. math

    subtract the fraction 74/5 from the fraction 18 6/15 and reduce your answer to the lowest terms.

    asked on December 8, 2012
  79. math

    add the fractions 2/3, 3/8, and 5/12 and reduce your answer to the lowest terms

    asked on December 8, 2012
  80. math

    a lumberyard makes picnic tables for $87.00 and sells them for $127.89. what is the percent markupbon each picnic table based on cost?

    asked on December 8, 2012
  81. math

    convert 5/8 to a decimal

    asked on December 8, 2012
  82. math

    convert 5/8 to a decimal

    asked on December 8, 2012
  83. Business Math

    John Roe, an employee of the Gap, loans $3000 to another employee at the store. He will be repaid at the end of 4 years with interest at 6% compounded quartly. How much will John be repaid?

    asked on December 5, 2012
  84. Business Math

    Lee Willis loaned Audrey Chin $16000 to open Snip Its Hair Salon. After 6 years, Audrey will repay Lee with 8% interest compounded quartly. How much will Lee receive at the end of 6 years?

    asked on December 5, 2012
  85. Business Math

    Lee Holmes deposited $ 15,000 in a new savings account at 9% interest compounded semiannually, At the beginning of year 4, Lee deposites an additional $40000 at 9% interest compounded semiannually. At the end of the 6 years what is the balance in Lee;s

    asked on December 5, 2012
  86. Chemistry

    find the volume of 56.4 g of a substance that has a density of 2.42 g/mL

    asked on November 8, 2012
  87. economics

    According to your text, our main sources of ethical standards are religion and A. philosophy. C. culture. B. social habit. D. circumstances

    asked on November 1, 2012
  88. physics

    A 301-kg motorcycle is accelerating up along a ramp that is inclined 30.0º above the horizontal. The propulsion force pushing the motorcycle up the ramp is 3420 N, and air resistance produces a force of 230 N that opposes the motion. Find the magnitude of

    asked on October 3, 2012
  89. math

    a rectangular garden has a length of 9 meters and a width of 7 meters. inside the garden is a square patch of roses. the patch is a square with sides of 4 meters. what is the area of the part of the garden NOT covered by roses?

    asked on September 30, 2012
  90. psychology

    Write a 350- to 700-word paper that explains which of Erikson’s eight stages of life you believe you are currently in. Explain why you think you are at that stage and describe that stage in your paper. What is the central question posed during that

    asked on September 17, 2012
  91. Physics

    A plane leaves Seattle, flies 85 mi at 22 degrees north of east, and then changes direction to 48 degrees south of east. After flying 115 mi in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches

    asked on September 12, 2012
  92. physics

    A plane leaves Seattle, flies 85 mi at 22 degrees north of east, and then changes direction to 48 degrees south of east. After flying 115 mi in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches

    asked on September 12, 2012
  93. Pharmacy Math

    If you diluted 95ml of a 7% benzocaine lotion to 5% how much could you produce? ___

    asked on July 30, 2012
  94. Pharmacy Math

    How much stock solution of hydrogen peroxide 8% will you need to make 320ml of hydrogen peroxide 2% solution? ____

    asked on July 30, 2012
  95. Pharmacy Math

    35ml of active ingredient is mixed with distilled water to total 300ml. What is the final concentration (v/v)? ____

    asked on July 30, 2012
  96. Pharmacy Math

    320ml of active ingredient is added to 680ml of an alcohol based solution. What is the final strength (v/v)? ___

    asked on July 30, 2012
  97. pharmacy math

    15g of potassium chloride is diluted in 2L of sterile water for injection. What is the final perccent strength (w/v)? ____

    asked on July 30, 2012
  98. Calc

    Compute the derivative of f(x)=5^x^2+1 using logarithmic differentiation.

    asked on July 18, 2012
  99. Business Calculus

    Determine the intervals where f(x)=e^-x^2/2 is increasing and decreasing

    asked on July 18, 2012
  100. math forgot questions

    a new refrigerator costs $2495. It may be purchased for $95 down and 24 monthly payments of $125 eachI forgot questions What is the total cost of the refrigerator if you finance it? b) What are the finance charges (total interest)?

    asked on July 7, 2012

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