# Questions Asked onMarch 24, 2014

1. ## Precalculus

The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line with a slope of -0.4 . Suppose that the height of the candle after 13 hours is 24.8 centimeters. What

2. ## math

The wholesale cost of a video game is \$459.45. The original markup was 51% based on selling price. Find the final sale price after the following series of price changes: a markup of 24%, a markup of 17%, and a markdown of 10%.

3. ## Statistics

Twelve different video games showing substance use were observed and the duration times of game play ( in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. use the data to

This is confusing to me: "Truth, Sekhar reflected, is like the sun. I suppose no human being can ever look it straight in the face without blinking or being dazed. He realized that, morning till night, the essence of human relationships consisted in

5. ## Math

Given the following function, choose the graph with the two possible angles with the domain 0 < or = to theta < or = to 360 degrees. Sec(theta)= -13/5

A diver stands on the end of a diving board as shown in the figure on the right. The mass of the diver is 58 kg and the mass of the uniform diving board is 35 kg. Calculate the magnitudes and directions of the forces exerted on the board at the points A

7. ## college physics

During a circus act, an elderly performer thrills the crowd by catching a cannon ball shot at him. The cannon ball has a mass of 10.0 kg and the horizontal component of its velocity is 8.00 m/s when the 65.0-kg performer catches it. If the performer is on

8. ## Physics

A diver stands on the end of a diving board as shown in the figure on the right. The mass of the diver is 58 kg and the mass of the uniform diving board is 35 kg. Calculate the magnitudes and directions of the forces exerted on the board at the points A

9. ## Physics

A railroad car with a mass of 12000 kg collides and couples with a second car of mass 18000 kg that is initially at rest. The first car is moving with a speed of 9 m/s before collision. If external forces can be ignored, what is the final speed of the two

10. ## Chemistry

Acetylene(C2H2) torches are used in welding. How much heat (in kJ) evolves when 2.0L of C2H2 (d=1.0967kg/m3) is mixed with a stoichiometric amount of oxygen gas? The combustion reaction is C2H2(g)+52O2(g)→2CO2(g)+H2O(l), ΔH∘=−1299.5kJ

11. ## Finance

Cochrane, Inc., is considering a new three-year expansion project that requires an initial fixed asset investment of \$1,860,000. The fixed asset will be depreciated straight-line to zero over its three-year tax life, after which time it will be worthless.

12. ## physics

a wheelof diameter 0.70 meterolls without slipping. a point at the top of the wheel moves with a tangential speed of 2.0 meter/second. a) at what speed is the axis of the wheel moving? b) What is the angular speed of the wheel?

13. ## english

i need help with chapter 10 and 11 sentence check 2

14. ## Physics( Explain and choose right answer)

A ball on the end of a rope is moving in a vertical circle near the surface of the earth. Point A F T is at the top of the circle; C is at the bottom. Points B and D are exactly halfway between A and C. Which one of the following statements concerning the

15. ## math

One day, the temperature outside increased by 6/10 every hour for seven hours. How much did the temperature increase that day?

16. ## Math

Convert theta = 225° to rectangular form. A) y = -1 B) y = 1 C) y = x D) y = -x E) x = -1

17. ## Financial

Cochrane, Inc., is considering a new three-year expansion project that requires an initial fixed asset investment of \$1,860,000. The fixed asset falls into the three-year MACRS class (MACRS Table). The project is estimated to generate \$1,950,000 in annual

18. ## social studies

According to Tardiff and Brizee, an essay that makes a claim supported by evidence is classified as an _______ essay. A. expository B. analytical C. argumentative D. explanatory My answer is A

19. ## math

Carlos invested his savings in two investment funds. The amount he invested in Fund A was \$8000 less than the amount he invested in Fund B. Fund A returned a 8% profit and Fund B returned a 4% profit. How much did he invest in Fund B, if the total profit

20. ## college chem 2

The enthalpy of vaporization of liquid diethyl ether is 26.0kJ/mol at 35'C calculate the deltaS' for vapor to liquid

21. ## Physics

The drawing shows an equilateral triangle, each side of which has a length of 2.20 cm. Point charges are fixed to each corner, as shown. The 4.00 µC charge experiences a net force due to the charges qA and qB. This net force points vertically downward and

22. ## social studies

Alice and Andrew are discussing thesis development. Alice argues that a topic becomes a thesis if we want to write about the topic. Andrew, on the other hand, maintains that a topic is not a thesis but that a thesis is the foundation of a topic. Who is

23. ## Trigonometry

Graph the function y=2sin(x-2pi/3). To draw the graph, plot all x-intercepts, minima and maxima within on period. I need to graph at least 5 points. I have -pi, 0, pi, 2pi, 3pi, and 4pi along the x-axis

24. ## Algebra

Which expression gives the solutions of –5 + 2x² = –6x?

25. ## Math

Inventory cost at Tech Co. is 35 percent per year. What is the per unit inventory cost for an MP3 player sold at \$50? Assume that the margin corresponds to the retailer's average margin.

26. ## math

Sonya spent 2/5 of her money and then had \$18 left. How much money did Sonya originally have?

27. ## social studies

In a biography, all of the following would be a primary source except for which one? A. A telegram sent to the subject by a friend B. An essay written about the subject by a former colleague C. The personal testimony of the subject’s widow, gathered in

For the most recent seven years, the U.S. Department of Education reported the following number of bachelor's degrees awarded in computer science: 4,033; 5,652; 6,407; 7,201; 8,719; 11,154; 15,121. What is the annual arithmetic mean number of degrees

29. ## Englisj

In Langston Hughes poem, Dreams, Would using a simile rather than a metaphor Negate or weaken Hughes' poem?

30. ## math

patterns with fractions write a rule for the sequence.then,find the unknown number how do you do this?ill give you an example...1/2, 2/3, 1, 1 1/6.it says,think:the pattern is increasing.add 1/6 to find the next term.here is a problem.... 1 3/8, 1 3/4, 2

31. ## Physics

A ladder, 5.0 m long, leans against a frictionless wall at a point 4.0 m above the ground. A painter is climbing up the ladder. The mass of the ladder is 12.0 kg and the mass of the painter is 60.0 kg. The ladder begins to slip at its base when the painter

32. ## Math

hope's mom baked a cake for hope's birthday. It is in the shape of a rectangle 10 inches long and 6 inches wide. If she starts at one corner and puts a candle every 2 inches, how many candles will fit around the edge of the cake?

33. ## science

True or False: One of the skin’s functions is to produce vitamin D (1 point) True False 2. Your _____ is the largest organ of your body. (1 point) brain large intestine skin lungs 3. The _____ is the outer, thinnest layer of your skin. (1 point) fatty

34. ## Math

For z1 = 4cis (7pi/6) and z2 = 3cis(pi/3), find z1 * z2 in rectangular form.

35. ## stats

X is normally dsitributed with mean 250 and standard deviation 40. what value of X does only top 15% exceed?

A ladder, 5.0 m long, leans against a frictionless wall at a point 4.0 m above the ground. A painter is climbing up the ladder. The mass of the ladder is 12.0 kg and the mass of the painter is 60.0 kg. The ladder begins to slip at its base when the painter

37. ## science question?

can someone explain this to me what does location has to do with wind energy availability

38. ## College Physics

The point charges in Figure 17.41 are located at the corners of an equilateral triangle 25.0 cm on a side, where qb = +12.0 µC and qc = -4.50 µC. (Assume that the +x-axis is directed to the right.) (a) Find the electric field at the location of qa.

39. ## trig

Find csc(theta), tan (theta), and cos (theta), where theta is the angle shown in the figure. Give exact values, not decimal approximations c=10 b=7 a=7.14 the right angle is locate between sides a and b and the theta angle is an acutle angle sides b and c.

40. ## math

Mr. Gonzalez's sixth-grade class is putting on a play. He reserved the first 6 rows of the auditorium for family members and friends of the 24 students in his class. If each row contains 17 seats and each student can invite the same number of guests, how

41. ## ps 65

Susan ate part of pizza.She ate more than 1/3 of the pizza. How much of pizza might Susan have eaten?

42. ## physics

A car moving with an initial speed v collides with a second stationary car that is 46.0 percent as massive. After the collision the first car moves in the same direction as before with a speed that is 37.7 percent of the original speed. Calculate the final

43. ## Chemistry

Arsenic acid (H3AsO4) is a triprotic acid with Ka1 = 5 ✕ 10-3, Ka2 = 8 ✕ 10-8, and Ka3 = 6 ✕ 10-10. Calculate [H+], [OH ‾ ], [H3AsO4], [H2AsO4‾ ], [HAsO42 ‾ ], and [AsO43 ‾ ] in a 0.16 M arsenic acid solution.

44. ## Math - PreCalc (12th Grade)

Which equation represents a hyperbola whose foci lie at (2, 7) and (2, -3)?

45. ## Physics( Explain and choose right answer)

A 3 kg cat sitting on a 1.5 kg piece of cardboard on a frozen lake wants to jump to shore without touching the ice. If there is no friction between the cardboard and the ice, when the cat jumps. the cardboard will move in the opposite direction with a

46. ## statistics

assume that blood pressure readings are normally distributed with a mean of 111 and standard deviation of 7. A researcher wishes to select people for a study but wants to exclude the top and bottom 10 percent. What would be the upper and lower readings to

47. ## chemistry

Distilled water normally contains dissolved CO2. When preparing NaOH standard solutions, it is important to use CO2 free distilled water. How does dissolved CO2 in distilled water affect the accuracy of the determination of a NaOH solution’s

48. ## math

The position of an object moving in a straight line is given by the function , where s(t) represents distance traveled and t represents the time the object has been in motion. How long (to the nearest tenth) will it take the object to move 17 meters?

49. ## Math - PreCalc (12th Grade)

How many different basketball teams of 5 players can be created from a group of 7 players?

50. ## math

Layne sends an email to 7 people and those 7 people send the email to 7 more people, and so on. Write an expression to show the number of people who will receive the email after the fifth round.

51. ## math

The wholesale cost of a video game is \$459.45. The original markup was 51% based on selling price. Find the final sale price after the following series of price changes: a markup of 24%, a markup of 17%, and a markdown of 10%.

52. ## Treaty of Paris, quick question, thanks! ☺

Treaty of Paris was the impetus for __________ recognition of the United States as an independent nation. a.Spain’s b.Britain’s c.Germany’s d.None of the above Thanks! ☺ ~katt

53. ## Physics

Water is boiled by burning coal. The resulting steam blows agains huge turbine blades. The turning blades spin in a magnetic field, producing electricity. Describe in order the energy conversions.

54. ## Physics

A wooden crate sits on the floor of a flatbed truck that is initially at rest, and the coefficient of static friction between the crate and the floor of the truck is 0.25. The driver of the truck wants to accelerate to a velocity of 20 m/s within 4.0 s. If

55. ## U.S History DBQ - need help to check my answer!!!

Document A: Andrew Jackson’s Bank Veto Message to Congress, July 10, 1832 Of the twenty-five directors of this bank, five are chosen by the government and twenty by the citizen stockholders. … It is easy to conceive that great evils to our country and

56. ## Physics

An Atwood's machine consists of two crates of different masses. If the pulley is frictionless and massless along with a string of negligible mass, find the acceleration of the crates and the tension in the string

57. ## Algebra

A box shaped like a rectangular prism has a height of 17 in and a volume of 2,720 in³ The length is 4 inches greater than twice the width. What is the width of the box? • –10 in • 8 in • 20 in • 40 in

58. ## physics

A compact disk player has just been turned off. A disk decelerates uniformly from an initial angular velocity of 7.90 rev/s. The disk rotates through 5.50 revolutions before coming to rest. What is the tangential acceleration of a point on the disk 5.05 cm

59. ## physics

A bookshelf is at rest in a room. A force of 35.0 newtons is applied to a bookshelf. If the floor imparts a frictional force of 2.90 newtons, what is the net force acting on the bookshelf?

60. ## Chemistry

A 3.0g sample of NaCl is added to a Styrofoam cup of water, and the change in water temperature is 6.5∘C . The heat of solution of NaCl is 3.76 kJ/mol. What is the mass (in g) of water in the Styrofoam cup?

61. ## statistics

help i do not understand how to solve this question: assume that blood pressure readings are normally distributed with a mean of 111 and standard deviation of 7. A researcher wishes to select people for a study but wants to exclude the top and bottom 10

62. ## math

Bladder infections are often caused when the bacteria E. coli reach the human bladder. Suppose that 3000 of the bacteria are present at time t = 0. Then t minutes later, the number of bacteria present will be a) How many bacteria will be present after 10

63. ## chemistry

2. When preparing a NaOH solution, a student did not allow the NaOH pellets to completely dissolve before standardizing the solution with KHP. However, by the time the student reﬁlled the buret with NaOH to titrate the acetic acid, the remaining NaOH

64. ## social studies

In harvesting sources, an excellent way both to narrow down a topic and discover a likely working thesis is to explore _______ the topic. A. different attitudes about B. radical ideas about C. classic literature on D. different perspectives on My answer is

65. ## chemistry

Calculate the resulting pressure if 4.50 liters of nitrogen at 35 degrees Celsius and 790 torr and 3.7 liters of oxygen at 15 degrees Celsius and 750 torr are pumped into a 1.00 liters container at 25 degrees celsius. Assume ideal gas behavior.

66. ## Chemistry: Check my answers?

Write “yes” or “no” below if the chemical equation is balanced or not. 1. 2H2 + O2 ---> 2H2O 2. S8 + 12O2 ---> 8SO3 3. HgO ---> Hg + O2 4. Zn + HCl ---> ZnCl2 + H2 5. 2Na + 2H2O ---> 2NaOH + H2 6. 2Al + 3FeO ---> Al2O3 + 3Fe 7. 4Si2H3 + 11O2 --->

67. ## science

mountains that are formed between two large faults are known as a. seamounts b. uplifted mountains c. plateaus d. fault-block mountains

68. ## algebra

find a polynomial f(x) of degree 4 that has the following zeros: 0,7,-4,5 Leave your answer in factored form

69. ## Algebra

What is a quartic function with only the two real zeros given? x = -4 and x = -1 A. y = x^4 + 5x^3 + 5x^2 + 5x + 4 B. y = x^4 - 5x^3 - 5x^2 - 5x - 4 C. y = -x^4 + 5x^3 + 5x^2 + 5x + 4 D. y = x^4 + 5x^3 + 5x^2 + 5x - 5

70. ## MATH

there are 400 students at smith Elementary school 1/4 of the students are in fourth and fifth grade, 1/10 of the students are in grade 3, 2/8 are in second grade and 2/5 are in first grade . How many kids are in each grade? (4th and 5th have an equal

71. ## Health

A swimmer would like to improve his time in the 100 yard freestyle race. After talking to his coach, he intends to focus on one critical element at the beginning of the race. This swimmer will try to improve his 100 yard freestyle time by improving his (1

72. ## Home Economics

1. How can disposal of fullness be done on the sleeve head?

73. ## Physics

A 5.1- kg concrete block rests on a level table. A 3.4- kg mass is attached to the block by a string passing over a light, frictionless pulley. If the acceleration of the block is measured to be 1.3 m/s2, what is the coefficient of friction between the

74. ## chemistry

Distilled water normally contains dissolved CO2. When preparing NaOH standard solutions, it is important to use CO2 free distilled water. How does dissolved CO2 in distilled water affect the accuracy of the determination of a NaOH solution’s

75. ## physics

Two pucks collide on an air hockey table. Puck A has a mass of 17.0 g and is initially traveling in the +x direction at 7.00 m/s. Puck B has a mass of 51.0 g and is initially at rest. After the pucks collide, puck A moves away at an angle of 52.0 deg above

76. ## social studies

The most important test of a paraphrase is A. how well it captures the essence of the original source using your own words. B. the number of synonyms found in the paraphrase. C. the extent to which your words parallel the words in the original source. D.

77. ## math

The deck in Hope's backyard is round. It has 5 posts evenly spaced around the edge to support a trellis. For her birthday party, she wants to connect each post to all the other posts with crepe-paper streamers. How many streamers will she report?

78. ## Physics

A 115.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 46.0 deg with the horizontal.what is the magnitude of the normal force between the ramp and the box? The applied force= 1167.04N

79. ## university of png

A car decelerates at -3.8m/second square without skidding when coming to a rest on a level road.what would its deceleration be if the road is inclined at 9.3degrees and the car moves uphill?(assume the same static friction coefficient and the car is on the

80. ## Economics

Suppose Bill is on a low-carbohydrate diet. He can eat only three foods: Rice Krispies, cottage cheese, and popcorn. The marginal utilities for each food are tabulated below. Bill is allowed only 167 grams of carbohydrates daily. Rice Krispies, cottage

81. ## math

Five friends each ate 2/12 of a pizza .What fraction of the pizza Is left?

7. The table below shows the probability distribution of the types of food purchased by students from the school cafeteria. What is the probability a student has purchased Caesar salad? (2 points) 0.17 Suppose houses are available for purchase during

83. ## Chemistry

How many moles of hydrochloric acid are required to react with 2.57 moles of calcium hydroxide in a neutralization reaction?

84. ## Trig - sum and difference formulas

Write the expression as a single trigonometric functions: cos 6x cosx - sin6x sin x if you could do it step by step? also... How do I prove that sin(90deg + theta) = cos(theta)?? also step by step so i may learn?

85. ## College Physics

A doubly charged ion is accelerated to an energy of 33.0 keV by the electric field between two parallel conducting plates separated by 1.70 cm. What is the electric field strength between the plates?

86. ## Math-Statistics

Assume you build a Candy castle for which you buy a bag of gummy bears, a block of chocolate and a bag of nuts. The weight of the three ingredients is a random variable (X1, X2 and X3) with mean weights μ1 = 200 gram, μ2 = 400 gram and μ3 = 150 gram.

87. ## PRE-CALC

A biased coin has a 0.4 probability of landing on tails. The random variable X, based on a single toss of the coin, is defined as follows: X = 0 if heads appears; X = 1 if tails appears. What is the mean value of X? A) 0.7 B) 0.5 C) 0.4 D) 0.3 E) 0.6

88. ## physics

Consider a toy car that you pullback to make it go forward. Is it a force multiplier or a distance multiplier? Defend your answer with the observations you could make

89. ## Chemistry

3.25g of zinc was added to 50cm^3 of a 4.0 molar dm^-3 HCl. When the reaction was completed the temperature rose by 28 degrees celcius. (a) Is the reaction exothermic or endothermic? (b)All the zinc dissolve in this reaction. How many moles of zinc

90. ## science question?

can someone explain to me?? can someone explain the economic impact of wind energy on an area

91. ## American History

I'm preparing for my oral report for my NHD Project which is based on the creation of the nazi party but I can't answer one question which is, what is the theme that the nazi party learned or what was the theme of world war 2? Please help me THANK YOU :)

92. ## Physics

A wagon is coasting at a speed vA along a straight and level road. When twenty-five percent of the wagon's mass is thrown off the wagon, parallel to the ground and in the forward direction, the wagon is brought to a halt. If the direction in which this

93. ## Math

Mohammed had ducks and cows on his farm. These 14 animals had a total of 40 legs. How many each animals did Mohamed have?

94. ## stats

Five percent of all items sold by a mail-order company are returned by customers for a refund. Find the probability that, of two items sold during a given hour by this company, neither will be returned for a refund.

95. ## Physics

A box of mass 54.0 kg is sitting on a ramp which makes an angle of 37.0 degrees with respect to the horizontal. The coefficient of friction between the box and the ramp is 0.21. This box is connected by a massless string over a pulley at the top of the

96. ## Macroeconomics

A key determinant of the price elasticity of supply is

97. ## History 8th

Washington’s troops, joined by the French forces under de Grasse and Lafayette, soundly defeated the British troops of General Cornwallis at the which battle?

98. ## Algebra 1 Answer Evaluation

Factor. 1. 30y^3 - 50y A: 10y(3y - 5y) 2. Factor a^2 - 5a^2 + 2a -10 by grouping. A: ?

99. ## physics

A 41.0-kg body is moving in the direction of the positive x axis with a speed of 306 m/s when, owing to an internal explosion, it breaks into three pieces. One part, whose mass is 8.0 kg, moves away from the point of explosion with a speed of 326 m/s along

100. ## math

mr andropolis wants to leave the waitress a 12% tip. estimate the tip he should leave if the family's bill is \$32.46

101. ## help

Sara runs several times a week and always keeps track of how much time she runs each time she goes out. One day she forgets to take her stopwatch with her and wonders if she can still have some idea of her running time. As she passes a particular pond, she

102. ## Science

Which statement summarizes water quality issues in China

103. ## Physics

Find the total change in the internal energy of a gas that is subjected to the following two-step process. In the first step the gas is made to go through isochoric heating until it gains 5363 J and its pressure is 2.92 105 Pa. In the second step it is

104. ## Physics

A wave can be propagated on a rope by holding one end of the rope and moving your hand up and down. The resulting wave is: A)neither transverse nor longitudinal. B)both transverse and longitudinal C)longitudinal D)transverse

105. ## World History

Could someone explain how nationalism contributed to Napoleon's defeat?

106. ## chemistry

how much heat is required when 6.00g of water is melted at its melting point

107. ## math

Enter only the value of the variable: 9(6-2v)=-12(v-11) i think its -13 is that correct ? if not what is it ?

108. ## math

it took tracy 1 1/4 hours to finish her homework . how many seconds did it take trac to do her work?

109. ## English

1. All of them are useful. 2. All of them is useful. 3. All is expensive. 4. All are expensive. 5. All is silent in the room. 6. All are silent in the room. --------------------------- Which ones are grammatical?

110. ## Math

An astronomical researcher is using software to study the parabolic path of an asteroid. By entering the equation for the path of the asteroid, the researcher could determine if the asteroid would collide with any other bodies in the near future. The

111. ## Biology

How does diving bradycardia reflex help explain why we can survive after falling into cold water and being submerged for long periods of time? Give a physiological reason that explains the relationship between lung size and body size. From a physiological

112. ## Physics

Two boxes of mass 7.40 and 7.00 kg are in contact and are accelerated across a horizontal surface by an force of 51.49 N applied parallel to the surface and pushing on the lighter box. The magnitude of the frictional force between the surface and the

113. ## Physics

A box of mass 50.0 kg is connected to a second box with a mass of 54.0 kg. Both are sitting on a horizontal surface and the coefficient of kinetic friction between the surface and each box is 0.51. If the second box is pulled away from the first box with a

114. ## math

Rachel spent 2 1/4 hours practing for her violin solo 5 times last week . How much times did Rachel spend practicing last week?

115. ## Chemistry

Your muscles are switched on by releasing calcium ion from the sarcoplasmic reticulum that surrounds your muscle bundles. The Ca2+ binds to a muscle ﬁber, and that triggers the contraction. To relax the muscle again, Ca2+ must be pumped out, so that the

116. ## Geometry

all square and all rectangles are equiangular?

117. ## physics

A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it

118. ## Algebra!

Can someone help me with these problems so i can do the rest of my textbook work on my own plz? What is the value of n so that the expression x^2+11x+n is a perfect square trinomial? (1 point) What is a solution of x^2+6x=-5? (1 point) What is the solution

119. ## Math-Statistics

5) You know that you will inherit 20% of your uncle John’s wealth, 30% of your aunt Becky’s wealth and 50% of your parent’s wealth. Since they are not dead yet, their respective wealth is a RV and all we know is that their wealth at death is ~N and

120. ## math

The 6th grade classes have started a contest to collect cans for recycling. The first class to reach 500 cans will win. The chart below shows the two classes in the lead. How many cans does each class have left to meet their goal? show the work .

121. ## economics, math

Could you please help me with this problem: Consider an oligopolistic market with two firms. Each of them produces using a cost function given by c(q)=q2. The aggregate demand in the market is given by 1000−p. Suppose that, in order to increase

122. ## College Chem

What is the maximum amount of barium sulfate that will dissolve in 600mL of 0.02M Na2SO4? Barium sulfate ksp=1.1*10^-10

123. ## Physics

Suppose a sled has a mass of 12 kg and a child is exerting a force of magnitude 200 N. Find the angle q at which the normal force N vanishes. What is happening physically when N = 0?

124. ## homonyms

What is the homonym for gnu???

125. ## math

Rosy has been jogging for 3 weeks. In the first week She jogged 3 days each for 4/6 of an hour. During week 2 she jogged for 3/4 of an hour on 2 days. In week 3 she jogged 4 days each for 3/5 of an hour . WRITE one expression that would show the total time

126. ## college chem 2

Calculate the deltaS univ for the dissolving of NaCl at room temp. S' NaCl(s)=72.11 J/k*mol; S' NaCl(aq)=115.5 J/k*mol;deltaH' NaCl(s)=-411.12 kJ/mol; deltaH' NaCl(aq)=-407.27 kJ/mol.

127. ## math

Jayden wants to be a fast runner like his big brother, Isaac. Isaac encourages Jayden to do a “30 for 30” challenge. This would require Jayden to spend 30 minutes outside every day for 30 days doing some type of physical activity. In return, Isaac

128. ## Math - PreCalc (12th Grade)

Which rectangular equation corresponds to these parametric equations? x = 0.2sec t and y = -0.25tan t A) 25x^2 − 16y^2 = 1 B) 25x^2 + 16y^2 = 1 C) x^2 − 16y^2 = 25 D) 25y^2 − 16x^2 = 1 E) 4x^2 − 16x^2 = 1

129. ## Physics

A 2.00-kg object is hanging on a 1.1m string. The object is pulled 20cm away from the equilibrium position and held there. a) What is the pulling force in the string when the object is kept still ? b) Now the object is released, what is the speed of the

130. ## man

How to -2x+6y=-26 8x+6y=-1 6using elimination method

131. ## Maths

marie puts dimes in groups of 4 with 2 dimes left over. When she puts them in groups of 5, she had 1 left over? What is the smallest number of dimes she could have if she has more than 10?

132. ## Math-Statistics

Assume your expected lifetime income is \$1.5 million and the standard deviation is \$250,000. a) What is the chance that you will earn more than \$1.1 million during your lifetime? b) What is the chance that you will earn less than \$2 million during your

133. ## math

The budget for the childrens museum's annual party is \$20,000 . Food accounts for 1/2 of the budget , beverages accounts for 1/5 of the budget, decorations for 1/8 ,and entertainment for 1/8 of the budget . The rest of the money will be spent on staffing

134. ## Physics

Two blocks of weights 77.0 and 114.0 N are connected by as massless string and slide down an inclined plane making an angle of 45.0 deg. to the horizontal. The cofficient of kinetic friction between the lighter block and the plane is 0.15 and that between

135. ## Physics

A small block on a frictionless surface has a mass of 70 g. It is attached to a massless string passing through a hole in a horizontal surface (see diagram). The block is originally rotating in a circle of radius 45 cm with angular speed 0.80 rad/s. The

136. ## math

Anna uses 5/6 tank of gas each week driving to work . How many tanks of gas does Anna use in 1 2/3 months.

137. ## Math

Which expression is equivalent to sin(3x) + sin x? A) 2cos(2x)sin x B) 2sin(2x)sin x C) -2sin(2x)cos x D) 2sin(2x)cos x E) -2cos(2x)sin x

138. ## Indian wells

5/8 of the students in mr. Halls class got an A or B . Four times as many students got an A than a B. what fraction of Mr. Hall's class got an A.

139. ## Math-Statistics

The chance that a college student has a job offer before graduation is 70%. If I sample 200 graduates… (use continuity correction) a) what is the chance more than 130 of them have a job offer? b) what is the chance less than 133 of them have a job offer?

140. ## Math

Joenia has 12 kiloliters of Gatorade. How many ml of Gatorade does she have?

141. ## English

I have an essay and this is one part of my thesis... "In the nineteenth century, some ways the middle class participated in revolutions was by establishing liberalism, one way was through literature, and through the revolutions of 1848." I wasn't sure if

142. ## math

Judie weighed 7 3/8 pounds when she was born .By the age of 6 she was 5 times as heavy . if A stands for pounds Write the equation you would use to find Judie weight at age 6

143. ## PRE-CALC

At how many points is this function discontinuous? f(x)=(2(x − 1)(x − 4))/((x + 2)(x − 5)) A) one B) two C) three D) four E) five

144. ## Finance

what is the net present value of a note for \$70,000, PAID MONTHLY AT \$600, plus 7% interest

145. ## math

1/2 as a decimal

146. ## critical thinking

is this a cliam or value judgemnt or ono-value judgement? 1. meat grilled over hickory coal tastes better than meat grilled over mesquite?

147. ## language

What is the synonym for car?

148. ## Calculus A

Find all relative extrema and points of inflection for the following function... h(X)= X^2+5X+4/ X-1 min= max= inflection points=

149. ## Physics

A 5-kg ball is at rest when it is struck head-on by a 2-kg ball moving along a track at 10 m/s. If the 2-kg ball is at rest after the collision, what is the speed of the 5-kg ball after the collision?

150. ## Water cycle question

The planet is covered by 97% ocean water. What would the global water cycle look like if the earth were covered by 50% ocean water?

151. ## math

The 6th grade classes have started a contest to collect cans for recycling. The first class to reach 500 cans will win. The chart below shows the two classes in the lead. How many cans does each class have left to meet their goal? show the work . find how

152. ## Algebra

Graph the rational function x/(x-6) To graph the function, draw the horizontal and vertical asymptotes (if any) and plot at least two points on each piece of the graph.

153. ## English

What can you do to save electricity? 1. I can unplug my computer when I go to bed. 2. I can turn off the lights when I leave my room. 3. I can unplug all the things such as the computer, the printer, the speaker, etc. 4. I can unplug the electric mat when

154. ## phisecs

.: A 5.0 kg block is moving with constant velocity down a rough incline plane. The coefficients of static and kinetic friction between the block and the incline are 0.25 and 0.20, respectively. What is the inclination angle of the incline plane?

155. ## Geometry

All square and all rectangles are equilateral?

156. ## Math

What is the exact value of sin(2 theta) if cos theta= 3/5 and theta is in quadrant IV?

157. ## math

0.625 as a percent

158. ## English

Analogies How is migration like a vacation? I think migration is like a vacation because the animal knows it is time to go to a warmer place where food will be plentiful and weather will be warmer.

159. ## Science

Which element would be most reactive? a. Al b. Cl c. P d. Na I initially thought that the answer was B, but I'm not sure about it. My second question is... Which non-metal is most reactive? a. Cl b. F c. I d. S I'm not sure about the answer for this one

160. ## literacy

how do you write a news report on the topic "storm shuts down region"??

161. ## Geometry

A fighter plane observes a target on the ground with an angle of depression of 21 degrees. The target is 3.5 miles away along a direct line of sight. How high is the fighter plane? Round to hundredths. Please help!

162. ## English

1. I haven't read Harry Potter yet. 2. I don't read Harry Potter yet. 3. I didn't read Harry Potter yet. ------------------------------ Which expressions are not grammatical? Is #2 or #3 grammatical?

163. ## Algebra 1 Answer Evaluation

Factor the following polynomial completely. "3c^2 + 12 - 63" My answer: (3x +9)(x - 7)

164. ## Treaty of Paris, quick question, thanks! ☺

The Treaty of Paris in part included returning to where exactly? I cannot remember and I am writing a paper for school in which I need to know where they went to. Thanks! ☺ ~katt

165. ## math

0.6 as a percent

166. ## Math

If your heart beats 24 beats inn10 sec,how many beats will it beat in 3 mins?

167. ## Geometry

All rectangles are square?

168. ## math

0.7 as a fraction

169. ## Calc Help :(((((

find the derivative of: (1/3)^(x^2) i got ln(1/3)*(1/3)^(x^2)*(2x) but the answer is supposed to be the negative of that.. where does the negative come in?

What is 1. 2/3 + 3/6 = 2. 3 1/10 + 17/5 = 3. 3 2/6 - 1 5/6 =

171. ## Chemistry

What is the molarity of a 5.00 x 102 ml solution containing 2490 g of KI? How many moles of LiF would be required to produce a 2.5 M solution with a volume of 10.5 L? How many grams of NaI would be used to produce a 2.0 M solution with a volume of 10.00 L?

172. ## math

If an airplane travels at 300 mph with no air resistance, and it travels directly south with a wind of 50 mph east, how fast is the plane going?

173. ## math

The decimal 4.25 is between which two integers? A. between -2 and +4 B. between -1 and +3 C. between -1 and +4 D. between -1 and +5

Whats The Next Step To This: 2025a+45b=-1.39 324a+18b=1.81

175. ## homonyms

What is the homonym for do?

176. ## Redox Titration questions!

Calculate the percent of iron in a 50.0 gram sample containing iron if 45.6 mL of 2.5 M KMnO4 titrant was used. can you solve this?

177. ## Water cycle question

Explain why residence time in the atmosphere for water is short but the flux in and out of the atmosphere is huge.

178. ## Calculus

Find dy/dx implicitly in terms of x and y only for the following function; x+ 4xy=y^2

179. ## Calculus A

Find all relative extrema and points of inflection for the function; h(x)=(x^2+5x+4)/(x-1)

180. ## Home Economics

1. Differentiate between techniques and processes. 2. Give two examples of each after differentiating.

181. ## Physics

A series circuit contains only a resistor and an inductor. The voltage V of the generator is fixed. If R = 15 and L = 5.6 mH, find the frequency at which the current is one-half its value at zero frequency. ?? Hz Thanks!

182. ## English

Is the comma in the right place below? Did you know, Dad, that the the colonists broke all the treaties signed by Philip and his father? Do the commas go there because to set off a nonessential appositive?

183. ## grammar

conjugate "They were students" in all form of tenses.

Suppose 8 kids are running a mile. 3/4 of the kids ran the mile in less than 10 minutes. How many kids finished the mile in less than 10 minutes.

185. ## physics

if you throw a 0.2 kg ball straight up at 8 m/s how high will it go

186. ## Music

So I can't follow links, but I am doing a slideshow about losing someone you care deeply about, (yes it is for school) and I am trying to find a certain song. It is country, I cannot remember the name of the song or the artist, but i know that it is two

187. ## Lit

I have an essay and this is one part of my thesis... "In the nineteenth century, some ways the middle class participated in revolutions was by establishing liberalism, one way was through literature, and through the revolutions of 1848." I wasn't sure if

188. ## trig

tan^2(5x)cos^4(5x) = 1/8 - 1/8cos(20x)

189. ## math

CALCULATE if 1/3of the candles are pink 3/8 are yellow and 1/4 is blue remaining 2 are white

190. ## math, economics

Consider a market in which consumption of the good being traded generates a positive externality. There are 100 identical consumers, each with a utility function given by 1/2√q+m+√G, where G denotes the total level of consumption in the market. The

191. ## math

Thomas bought a 3-foot sandwich for his .Hew figured out that each guest can have 1 1/2 inches of the sandwich . HOW MANY guest does Thomas have.

192. ## Puncuation

Does this sentence require any improvements in terms of punctuation? I think Hansberry means that summer is honorable in terms that this season does fulfill wishes and dreams like she had been told; Hansberry’s wish being that the dying woman could live

193. ## English

What is the difference between lunch plate and lunch tray in shape? Do both mean the same?

194. ## econ

economics- what is the law called where cost of input increases so cost of output must increase (in order to keep max profit)

195. ## geometry

gerri raced around all the faces of a three-dimensional shape.she drew the following polygons.what three-dimensional was gerri tracing.

196. ## 6th gr. math

0.2 as a percent?

197. ## physics

explain the input energy and out put energies of two kitchen machines

198. ## Speech- Statistic needed

Does anyone know of any websites that have statistics on the number of people that volunteer for disaster relief in the us?

199. ## Implicity

Find dy/dx implicitly in terms of x and y only for the following function; X+4xy=y^2

200. ## English

Need an example of an analogy that has to do with migration is like a vacation. Don't have any idea!!! I am lost on this one Maybe "Vacation is like a migration to a tropical island"

201. ## math

Rachel , smith , john and Thomas brought in 300 pennies for the penny harvest . Smith brought in 2/6 of the pennies . Rachel brought 1/5 and Thomas brought 1/4 of the pennies. How many pennies did john bring in?

202. ## math

There are 3 earthworms .Their length are 6 1/4 inches, 4 1/4 inches and 5 3/8 inches. What is the total length of the three earthworms.

66+77=143

204. ## math

Thomas bought a 3-foot sandwich for his .Hew figured out that each guest can have 1 1/2 inches of the sandwich . HOW MANY guest does Thomas have.

205. ## bussines

does it take longer to get your mba if you take bcom over bba?

206. ## math

kevin bought a 3-foot sandwich for his .Hew figured out that each guest can have 1 1/2 inches of the sandwich . HOW MANY guest does kevin have

207. ## math

0.125 as a percentage?

208. ## math

0.25 as a fraction

209. ## math

0.6 as a fraction

210. ## math

1/20 as a fraction?

211. ## math

2/5 as a decimal