# Caroline

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

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

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

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

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

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

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

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

9. ## ALGEBRA! URGENT.

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

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

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

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,

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

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:

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

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

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

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

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.

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?

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

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?

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

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?

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?

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

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

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

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)

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

32. ## Math

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

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

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

35. ## BIOLOGY

A SALT IS OBTAINED AS A REACTION BETWEEN A SALT (and water) IS OBTAINED AS A REACTION BETWEEN a base and an acid. See: http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/acidbase.html http://lrs.ed.uiuc.edu/students/erlinger/water/background/ph.html I

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.

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

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

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

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

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

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

43. ## TOURISM

PROJECT INFLUENCE OF GLOBAL EVENTS ON TOURISM

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?

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

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?)"

47. ## Pre-Calculus

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

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?

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?

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

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?

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?

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?

54. ## math

what is one fourth of eight

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

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

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 ????

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 ??

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?

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?

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.

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

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

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?

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?

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)

67. ## French

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

68. ## life orientation

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

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

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

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)

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?

73. ## Chemistry

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

74. ## Math

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

75. ## Math

How can you check the answer to a decimal multiplication problem

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

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:

78. ## MATHS

CONSTRUCT ON A SINGLE DIAGRAM ,TRIANGLE ABC IN WHICH BC=10CM,CA=7CM, AB= 8,5CM ,THE LOCUS POINT P GIVEN THATBP==PC,THE LOCUS OF A POINT Q SUCH THAT AQ=4CM

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

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

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

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?

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

84. ## Math

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

85. ## Math

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

86. ## Economics

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

87. ## math

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

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 = \$?

89. ## Life orientation

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

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,

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

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

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

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

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

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 ?

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?

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

99. ## life orientation

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