Popular questions and responses by Caroline
  1. Math Homework: Check Answers

    1. Suppose you earned 8t - 3 dollars on Monday and 6t + 5 dollars on Tuesday. What were you total earnings? Simplify your answer. A) 2t + 2 B) 2t - 8 C) 14t + 2 D) 14t - 8 Answer: A 2. f^2 • f^4 A) (2f)^8 B) (2f)^6 C) f^8 D) f^6 Answer: D 3. 100^12/100^8

    asked on May 27, 2014
  2. Pre-Calculus

    Driving down Bald Mountain in Wyoming, Bob dean finds that he descends 1600 feet in elevation by the time he is 2.5 miles (horizontally) away from the high point on the mountain road. Find the slope of his descent (Hint: 1 mile = 5280 feet) After

    asked on January 10, 2013
  3. Calculus

    Find the total mass of the triangular region with coordinates (-1,0),(0,4),and (1,0). All lengths are in centimeters, and the density of the region is (x)=5+x grams/c^m2. I know that to get the total mass i have to do density* lenght and ingegrate, but I

    asked on October 26, 2011
  4. calculus

    The given curve is rotated about the y-axis. Find the area of the resulting surface. y = 1/4x^2 − 1/2ln x, 4 ≤ x ≤ 5 The answer is supposed to be 64/3*pi

    asked on October 8, 2011
  5. Algebra 1

    Will you please check my work? :) Choose ALL (if any) applicable terms for the events described, then calculate the probability of the events. Jason has a cube with colored sides: red, orange, yellow, green, blue and purple. 1. Rolling a red or a primary

    asked on April 27, 2014
  6. Chemistry

    What is the value of the equilibrium constant at 25°C for the reaction between each of the following? (a) Sn(s) and Pb2+(aq) (b) Cr(s) and Cu2+(aq) I have been unable to get either and have spent the last two hours attempting it. I have been using the

    asked on May 4, 2015
  7. Algebra 1

    Can you please check my work and help me with the parts that I don't understand? For each event, choose the most appropriate term and solve the problem. 1. In a sweepstakes with nine hundred entries, the first winner selected receives the grand prize, the

    asked on April 27, 2014
  8. please help! physics

    A 1200 kg car is moving at 95 km/h when the driver notices a deer down the road. He immediately moves his foot toward the brake pedal, taking only 0.50 seconds before the car starts slowing down. The brakes cause a net force of 2400 N (backwards) on the

    asked on October 21, 2014

    1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54 b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the mode

    asked on March 5, 2014
  10. language arts

    What is the appositive in this sentence? My father, David, goes to the golf course on Sundays. David father golf course Sundays

    asked on May 18, 2017
  11. chemistry

    Approximately how many joules of heat are needed to raise the temperature of a 4.0-gram sample of water to 8.0C? that is all of the information that was provided

    asked on December 1, 2015
  12. Algebra 1

    Can you please check my work? A city planning committee surveys 100 people waiting at a bus stop about the expansion of the public transportation system. Is this an example of a: random sample, systematic sample, self-selected sample, convenience sample,

    asked on April 27, 2014
  13. language arts

    What is the preposition in this sentence? After the movie, we will grab a pizza to take home. after will grab to I think C

    asked on May 18, 2017
  14. Chemistry

    The coinage metals -- copper, silver, and gold -- crystallize in a cubic closest packed structure. Use the density of gold (19.3 g/cm3) and its molar mass (197 g/mol) to calculate an approximate atomic radius for gold. Work So Far:

    asked on February 3, 2015
  15. trig

    An airplane pilot wishes to maintain a true course in the direction 250° with a ground speed of 400 mi/hr when the wind is blowing directly north at 60 mi/hr. Approximate the required airspeed and compass heading

    asked on April 1, 2013
  16. Chemistry

    At 19.0°C, what is the fraction of collisions with energy equal to or greater than an activation energy of 151.0 kJ/mol? I got 1.06 which wasn't right

    asked on March 4, 2015
  17. Math Help? Check my answers.

    1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54 b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the mode

    asked on March 5, 2014
  18. physics

    I am having a really hard time figuring this question out, would somebody be able to help me? Imagine a giant dry-cleaner's bag full of air at a temperature of -35∘C floating like a balloon with a string hanging from it 12km above the ground. Estimate

    asked on August 5, 2013
  19. algebra Urgent!

    I need help with the problem: A is a constant such that the graph of the equation Ax-3y=6 passes through the point (1,-3). Find A.

    asked on January 12, 2009
  20. Probablility

    There are 4 cardio stations and six weight lifting stations at the gym. You decide to chose 4 stations randomly for today's workout. Whats the probability that you choose all weight lifting or all cardio?

    asked on November 27, 2016
  21. Chemistry

    1. Imagine you have a saturated solution of Ca(OH)2, at equilibrium, that has some undissolved Ca(OH)2 precipitated on the bottom of the test tube. If you add an additional scoop of Ca(OH)2 to the solution will concentration of [OH-] in the solution

    asked on March 16, 2015
  22. Pre-Calculus

    Could someone check my answers? 25. 32^(2x-3)=2 Answer- x= 8/5 26. 9^(2x+1)=81 Answer- x= 1/2 27. 1/4=2^3x Answer- x= -2/3 28. 1/27=3^2x Answer- x= -3/2 29. 9^x=27 Answer- x= 3/2 30. 32^x=4 Answer- x= 2/5 31. 27^(x+1)=9 Answer- x= 1/2 32. 125^(x-2)=25

    asked on May 1, 2013
  23. physics

    If you stand on a bathroom scale, the spring inside the scale compresses 0.50 mm, and it tells you your weight is 680 N. Now if you jump on the scale from a height of 1.4 m, what does the scale read at its peak?

    asked on March 2, 2012
  24. chemistry

    Ethylene glycol, HOCH2CH2OH, is used as antifreeze. It is produced from ethylene oxide, C2H4O, by the following reaction. C2H4O(g) + H2O(l) → HOCH2CH2OH(l) Use Hess's law to obtain the enthalpy change for this reaction from the following enthalpy

    asked on October 29, 2010
  25. Chemistry

    Approximately how many joules of heat are needed to raise the temperature of a 4.0-gram sample of water to 8.0C?

    asked on November 30, 2015
  26. Honors Physics

    A canoeist is trying to paddle upstream in a river that has a velocity of 6.1 m/s. If he can paddle his canoe at a velocity of 6.2 m/s, will he make any headway? What will his velocity relative to the shore be?

    asked on December 18, 2014
  27. PHY 101

    An archer aims an arrow precisely horizontally over a large, flat field and lets it fly. At the same instant, the archer's watchband breaks and the watch falls to the ground. Does the watch hit the ground before, at the same times as, or after the arrow

    asked on February 5, 2013
  28. MAth

    I set this problem up as 500-2X=3,400 Marys monthly salary is $500 less than twice her daughter's salary. Together they earn $3,400 each month. How much is the daughter's salary. ans-1,300 500-500-2x=3,400-500 2x=3,100 2x/2=3,100/2 what am I missing

    asked on April 15, 2011
  29. physics

    Two cubic blocks are in contact, resting on a frictionless horizontal surface. The block on the left has a mass of mL = 6.70 kg, and the block on the right has a mass of mR = 18.4 kg. A force of magnitude 112 N is applied to the left face of the left

    asked on October 31, 2010
  30. chemistry

    Carbon disulfide is a colorless liquid. When pure, it is nearly odorless, but the commercial product smells vile. Carbon disulfide is used in the manufacture of rayon and cellophane. The liquid burns as follows. CS2(l) + 3 O2(g) → CO2(g) + 2 SO2(g)

    asked on October 29, 2010
  31. Physics

    A daredevil is shot out of a cannon at 45.0° to the horizontal with an initial speed of 28.0 m/s. A net is positioned a horizontal distance of 51.0 m from the cannon. At what height above the cannon should the net be placed in order to catch the

    asked on September 30, 2010
  32. Math

    Please help with this problem! What is the positive three-digit integer that is four times the product of its digits?

    asked on April 7, 2009
  33. Math

    Please help with this problem! Brandon wishes to fence in a rectangular area of his lawn for his rabbit. If the measure, in feet, of each side of the enclosure is a positive integer and the perimeter of the enclosure is 70 feet, what is positive difference

    asked on April 7, 2009
  34. algebra 1

    express the area of each triangle as a monomial. 10. height-2n^2 base- 5n^3 11. height- 4ab^5 base- 3a^4b

    asked on February 5, 2008


    asked on September 30, 2006
  36. 5th grade math

    Darren finished 5/6 of his homework. Olivia finished 1/6 less than Darren. How much of Olivia's homework did she finish? Make sure to simplify your answer.

    asked on January 9, 2017
  37. math algebra

    A tax free municipal bond pays 4.75% compounded continuously. What is the value of a $2,000 bond after 30 years? Round your answer to the nearest cent. [Hint- A=P e^rt where P= present(initial) value, A= future value, r= annual rate, and t= number of

    asked on December 1, 2016
  38. Calculus

    A lighthouse is built on an exposed reef, 5 miles off-shore. The shoreline is perfectly straight, and a town is located 9 miles downshore from the point on the shoreline nearest the lighthouse. The lighthouse keeper needs to go from the lighthouse to the

    asked on November 8, 2016
  39. Physics

    You push a skateboard so that it rolls down the road at a speed of 0.700 m/s. You run after the skateboard at a speed of 3.90 m/s and while still behind the skateboard you jump off the ground at an angle of 28.0° above the horizontal hoping to land on the

    asked on September 25, 2016
  40. Math

    1. what is the solution o 204 - (-36)? A 240** B - 240 C 168 D -168 2. what is the solution of 87 + (-396)? A 183 B -183 ** C 9 D -9 3. Evaluate: -12 x 3 =? A 36 B -36** C 4 D -4 4. Evaluate: -20 ÷ -10 =? A 200 B -200 C 2 **8 D -2 5. Select all the

    asked on September 12, 2016
  41. algebra 1

    Evaluate: 30 - m/6 for m = 30. a. 25 b. 0 c. 6 d. 1 i chose a. 25? please verify. thanks

    asked on May 21, 2016
  42. Math ratio

    Melanie mixes water with plant fertilizer in a proportional relationship that can be represented by the equation w=3p, where w is the number of quarts of water and p is the number of tablespoons of plant fertilizer. To keep this suggested ratio,should

    asked on April 10, 2016


    asked on February 22, 2016
  44. Math

    gena,freddie,and hank went running.gena ran 1/3 mile,freddie ran 4/7 mile,and hank ran 2/5 mile.who ran the farthest?

    asked on October 8, 2015
  45. Math / Finance

    You are planning to save for retirement over the next 15 years. To do this, you will invest $1,100 a month in a stock account and $500 a month in a bond account. The return on the stock account is expected to be 7%, and the bond account will pay 4%. When

    asked on September 20, 2015
  46. ela

    is there another way of saying better understand? the snetence im trying to write is "imagery can also help the reader to better understand the poem thus the reader is able to ...(is it appropriate to write better understand again here?)"

    asked on February 2, 2015
  47. Pre-Calculus

    45. log b sqrt 7x 46. log b sqrt (3/y) Could someone please explain these?

    asked on May 5, 2013
  48. Math

    I have some white and black marbles in a box. There are 30 white marbles. There are 14 more white marbles than black marbles. How many black marbles do I have?

    asked on April 5, 2013
  49. Pre-Calculus

    State the domain and range of the relation y = 2x + 3 My answer: y= 2x+3 y= 2(1)+3=5 domain: 1 range: 5 This is how my book showed me how to do it. I just wanted to make sure I did it right. If not could you please give me an example?

    asked on January 22, 2013
  50. Science

    1. A certain radar installation transmits electromagnetic radiation with a wavelength of 2.5 cm. What is the frequency of this radiation? 2. For the radar above, how many seconds will it take for a signal to reach an airplane 15 km away, and return to the

    asked on November 13, 2012
  51. Finance

    During a job interview, Pam Thomson is offered a salary of $28,000. The Company gives annual raises of 6 percent. What would be Pam's salary during her fifth year on the job?

    asked on July 27, 2012
  52. Chemistry

    the mass of the crucible is 19.73 g fill the crucible with CuSO4 which was 26.44 g Heat the crucible until the water is released it weighed 23.40 g So now, how many moles of water is removed? The number of moles of CuSO4 that after dissolution rest?

    asked on June 6, 2012
  53. physics

    If you drop a stone into a well that is d = 122.0 m deep, as illustrated in the figure below, how soon after you drop the stone will you hear it hit the bottom of the well?

    asked on March 28, 2012
  54. math

    what is one fourth of eight

    asked on November 30, 2011
  55. English language

    what could be an example of something that is urgent but is not important? and something that is important but not urgent? these questions refer to daily actions or well any actions, i have absolutely no idea how to answer that. Sure doesn't urgent and

    asked on November 29, 2011
  56. Calculus

    A steady wind blows a kite due west. The kite's height above ground from horizontal position x = 0 to x = 60 ft is given by y = 150 − 1/40(x − 50)^2. Find the distance traveled by the kite. (Round your answer to one decimal place.) THe answer is

    asked on October 7, 2011
  57. MAth

    a concrete area measures 20ft on each side. the concrete slab will be 8 inches deep. how many cubic feet of concrete will be needed? my set up is 20 x 20 + 32 ????

    asked on April 15, 2011
  58. MAth

    I don't know how to begin this one-help Janie bought 2 pairs of identical jeans at a sale.she paid regular price for the 1st pair and paid half price forthe 2nd pair.if the the total cost was $45.00,what was the regular price of the jeans? 2x-1/2x=45 ??

    asked on April 15, 2011
  59. MAth

    jerry is 6 more than 3 times as old as his son.together they are 46 yrs old. how old is jerry. ans -36 I set up problem 6+3x=46 to start?

    asked on April 15, 2011
  60. physics. please help!

    A 2.5 kg block is pulled to the right by a horizontal string. The coefficient of static friction between the block and the floor is 0.30 and the coefficient of kinetic friction is 0.20. What value of force applied by the string will start the block moving?

    asked on October 31, 2010
  61. chemistry

    How many grams of oxygen gas are required to produce 7.46 kJ of heat when hydrogen gas burns at constant pressure to produce gaseous water? 2 H2(g) + O2(g) → 2 H2O(g) ΔH = −484 kJ Liquid water has a heat of vaporization of 44.0 kJ per mole at 25°C.

    asked on October 29, 2010
  62. chemistry

    Hydrogen cyanide is a highly poisonous, volatile liquid. It can be prepared by the following reaction. CH4(g) + NH3(g) → HCN(g) + 3 H2(g) What is the heat of reaction at constant pressure? Use the following thermochemical equations. N2(g) + 3 H2(g) → 2

    asked on October 29, 2010
  63. chemistry

    Aluminum metal reacts with iron(III) oxide to produce aluminum oxide and iron metal. (a) How many moles of Fe2O3 are required to completely react with 55 g Al? mol (b) How many moles of Fe are produced by the reaction of 3.00 mol Fe2O3 and 97.7 g Al? mol

    asked on September 25, 2010
  64. chemistry

    A 2.9-L sample of paint that has a density of 4.65 g/mL is found to contain 26.7 g Pb3N2(s). How many grams of lead were in the paint sample?

    asked on September 25, 2010
  65. world history

    Why was the Parthenon, Theater of Dionysus, The Temple of Delphi, The Agora, and the Marble Shop important to Ancient Greeks in Athens?

    asked on April 25, 2010
  66. algebra

    32x+8=? Which algebric expression has the same value, explain method, please.. 4(x+2) 8(4x+1) 4(8x+1) 8(4x+8)

    asked on January 12, 2010
  67. French

    Hi! Could anyone tell me what "Je ne deteste pas" means?

    asked on October 22, 2009
  68. life orientation

    give three examples of human Rights violation or discrimination and give reasons

    asked on April 24, 2019
  69. MAth

    Mrs.Williams is going to purchase a plastic cover for her outdoor fish food pond.The area of the fish pond is 25m2.However ,she must purchase a cover that is 12% more than the pond area in order to cover the entire edges of the pond.The plastic cover costs

    asked on January 31, 2019
  70. Science

    1. What stretches over most of the Arabian Peninsula ? a. Fertile farmland b.forest c. Desert d. Lakes 2. Camels were used by Bedouin’s because they require very little a. Food b. Water c. Sunlight d. Sleep 3. A search of waterfront in the desert is

    asked on May 21, 2018
  71. Statistics

    The normality of NaOH obtained was 0.0172, 0.0187, 0.0185, 0.189, and 0.0183 N. The theoretical normality of NaOH was 0.02 N. Please calculate: 1) Standard deviation based on the true mean: 2) Standard deviation based on the experimental mean: SD 3)

    asked on February 18, 2018
  72. Chemistry

    What volume of concentrated sulfuric acid (20% weight/weight, density = 1.14) is needed to prepare 1 L of a 0.5 N solution of sulfuric acid?

    asked on February 11, 2018
  73. Chemistry

    Describe the preparation of 500 ml of 0.25 M solution of NaOH from NaOH pellets (88% purity).

    asked on February 1, 2018
  74. Math

    How do you check the answer to a decimal multiplication problem plz explain your reasoning

    asked on December 3, 2017
  75. Math

    How can you check the answer to a decimal multiplication problem

    asked on December 3, 2017
  76. Math

    The amount of active ingredient of medicine ingested by the body, A in milligrams, is a function of time, t, in hours, given by A(t)=5/8(12t-t^2). a)Determine the average rate of change of the amount of medicine ingested during each of the intervals below

    asked on July 25, 2017
  77. Math

    Two software companies are developing new android apps. The average profit per x hundred downloads earned by each company can be modelled by the rational functions below, where x > or equal to 0. Trance Media: G(x)=80x+150/x Ellen's incorporated:

    asked on July 25, 2017
  78. MATHS


    asked on June 26, 2017
  79. language arts

    Jane's artwork is displayed alongside other contemporary art pieces at the modern art museum. which word that can be used to describe Jane's artwork has the most positive connotation? weird eccentric original odd

    asked on May 18, 2017
  80. Physics

    A non-homogeneous trunk, 5 meters long and 100 kilograms mass is in equilibrium and is hung at the ends by two strings; One form an angle of 37 degrees and the other an angle of 53 degrees, both with the horizontal. Determine the location of the center of

    asked on December 10, 2016
  81. Math

    Leah spent 5/6 of an hour doing homework on Monday on Tuesday she spent 3/4 of an hour and on Wednesday she did it in 5/8 of an hour How much time did she spend doing her honework on Minday Tuesday and wednesday I know how to concert 5/6 and 3/4 hour but

    asked on November 29, 2016
  82. Physics

    a 50 kg ice skater is skating on a frozen lake where the ice has a coefficient of friction of .08. How much force is required to push her across the ice at a constant velocity?

    asked on October 5, 2016
  83. Physics

    You throw a water balloon hoping to hit your sibling. You throw it at an angle of 21.0° at 5.50 m/s. It ends up leaving your hand at a height of 1.70 m above the ground. It completely misses your sibling and breaks on the ground. How far did the water

    asked on September 25, 2016
  84. Math

    what is the vale of 4²-2(3÷5 + 1)? A 8 B 1 C -16* D -21

    asked on September 12, 2016
  85. Math

    which symbol is used to make -6 |-8| a true statement? A > B < C =

    asked on August 24, 2016
  86. Economics

    What factors do you need in order to calculate a country's level of development?

    asked on May 29, 2016
  87. math

    An account earns annual simple interest. Find the balance of the account. $2000 at 9% for 6 months = $

    asked on May 25, 2016
  88. math

    An account earns annual simple interest. Find the balance of the account. $250 at 4% for 1 year = $260 $2000 at 9% for 6 months = $?

    asked on May 25, 2016
  89. Life orientation

    Evaluate the physical,social and economic consequences of this crime to the offender

    asked on May 1, 2016
  90. Math

    1.Male and female high school students reported how many hours they worked each week in summer jobs. The data is represented in the following box plots: two box plots shown. The top one is labeled Males. Minimum at 1, Q1 at 3, median at 10.5, Q3 at 14,

    asked on February 22, 2016
  91. Art

    When creating a collection based on a message, an artist should consider all of the following except A. the audience the collection will the presented to B. the subject matter they most prefer using as a reference C. the dollar amount they wish to sell it

    asked on January 15, 2016
  92. Physics

    You have two tuning forks. One is a known frequency of 200 Hz. The second for his plate, there is a big frequency of five beats per second. What a piece of gum is placed on the second fork, the frequency increases three beats per second. What is the

    asked on January 14, 2016
  93. English

    When the subject of the sentence is plural, should the nouns that follow agree with the subject's plurality? For example: In this stage, writers review and amend their paper to better articulate their intended message. Should the terms "paper" and

    asked on November 24, 2015
  94. physics

    A hollow cylinder, a solid cylinder, a hollow sphere, and a solid sphere roll down a ramp without slipping, starting from rest. The ramp is 0.25 m high. All the objects have radius 0.035. What are their final speeds? Please show what equation you used and

    asked on November 5, 2015
  95. Physics

    two students working on physics assignment to find out how far window is from the roof of a building drop a ball over the edge of the roof the ball takes .1 seconds to travel from the top of the window to its bottom of a distance of 1 m assume the

    asked on October 19, 2015
  96. Physics

    A child climbs up a set of stairs and reaches a height of 2.5m what is the child's gain I potential energy ?

    asked on October 11, 2015
  97. physics

    A box of mass 50 kg starts from rest to slide down a ramp that makes an angle of 10.7 degrees with respect to the horizontal. 6.3 seconds later, it has covered a distance of 3.39 meters. What is the coefficient of kinetic friction?

    asked on September 30, 2015
  98. Finance

    You are planning to save for retirement over the next 15 years. To do this, you will invest $1,100 a month in a stock account and $500 a month in a bond account. The return on the stock account is expected to be 7%, and the bond account will pay 4%. When

    asked on September 19, 2015
  99. life orientation

    extent to which bad road use has a direct impact on the physical

    asked on August 23, 2015
  100. algebra 2 and trig

    The scores on a chemistry test are normally distributed. Approximately 95 percent of the scores fell between 78 and 92. What is the standard deviation for this distribution?

    asked on May 18, 2015


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