# Questions Asked onNovember 9, 2012

1. ## calculus

A sample of a radioactive substance decayed to 94.5% of its original amount after a year. (Round your answers to two decimal places.) (a) What is the half-life of the substance? (b) How long would it take the sample to decay to 65% of its original amount?

2. ## calculus

The radius of a sphere is increasing at a rate of 2 mm/s. How fast is the volume increasing when the diameter is 80 mm? mm^3/s

3. ## Physics

Water moves through a constricted pipe in steady, ideal flow. At the lower point shown in the figure below, the pressure is 1.70 105 Pa and the pipe radius is 2.50 cm. At the higher point located at y = 2.50 m, the pressure is 1.30 105 Pa and the pipe

4. ## Physics

A uniform soda can of mass 0.135 kg is 12.4 cm tall and filled with 1.25 kg of soda (figure below). Then small holes are drilled in the top and bottom (with negligible loss of metal) to drain the soda. (Initially the soda can is full.)(a) What is the

5. ## physics, help!!

A metallic sphere initially has a net charge of +4.0 nC. A negatively-charged rod initially has a net charge of –6.0 nC. When the rod touches the sphere 8.2 x109 electrons are transferred to the sphere. What is the new net charge on the sphere?

6. ## Physics

A ball and a thin plate are made from different materials and have the same initial temperature. The ball does not fit through a hole in the plate, because the diameter of the ball is slightly larger than the diameter of the hole. However, the ball will

7. ## Chemistry

A 1.30-L sample of argon gas is at 1.02 atm and 21.5 degrees Celsius. a. what mass of argon is in the container. b. If the temperature is raised to 500 degrees celsius while the volume remains constant, calculate the new pressure, in stmospheres.

8. ## calculus

Use a linear approximation (or differentials) to estimate the given number. e0.01

9. ## chemistry

What is pH of 0.1M solution of NH4Br, if the pKb of NH3 is 4.74?

10. ## Chem

Give the number of unpaired electrons present in a ground-state atom of Tl. I got 5, which isn't right. ndicate which species in each pair has the higher ionization energy. Choose at least one answer. a. Between K and I, I b. Between K and I, K c. Between

11. ## physis

A box slides downwards at a constant velocity on an inclined surface that has a coefficient of friction uK = .58 The angle of the incline, in degrees, is most nearly:

12. ## Precalculus

Write y^2 + 8x = 0 in polar form.

13. ## Physics

A thermos contains 150cm3 of coffee at 85° C. To cool the coffee, you drop two 10g ice cubes into the thermos. The ice cubes are initially at 0° C and melt completely. What is the final temperature of the coffee? Treat the coffee as if it were water.

14. ## chemistry

Consider the following reaction: 2H2 (g) + O2 (g)  2H2O (l) ΔH = -572 kJ a. How much heat is evolved for the production of 1.00 mol H2O (l)? b. How much heat is evolved when 4.03 g hydrogen is reacted with excess oxygen? c. How much heat is evolved

15. ## chemistry

what elements follow the octet rule?

1. What are the equivalent fraction and decimal for thirty-three and one-third%? (1 point) one over thirty-three and 0.3 one over thirty-three and 3 3three and one-third and CE_point thirty three repeating_large one-third and point thirty-three repeating

17. ## college algebra

find the function that is finally graphed after the following transformations are applied to the graph of y=sqrt x in the order listed. 1. relected about the x-axis 2. shift down 9 units 3. shift left 2 units y=

18. ## Calculus

The police department must determine a safe speed limit on a bridge so that the flow rate of cars is at a maximum per unit time. The greater the speed limit, the farther apart the cars must be expected to be in order to allow for a safe stopping distance.

19. ## Physics

An umbrella with a diameter of 1 m turns 22 rev every 44 seconds. If it's 1.5 m from the ground, calculate the time it takes for a drop to reach the ground and the distance away from the umbrella a person should stand so as to not get wet. For this problem

20. ## physics

What are the atomic number and the atomic mass of the element formed when 84 218Po emits a beta particle? What are they if the polonium emits an alpha particle?

Answer the following function. f(x)=2x^2-x-1 A. Is the point (-2,9) on the graph of f? B. If x equals 2, what is fx? What point(S) are on the graph of f? c. if f(x)= -1, what is x? what point(s) are on the graph of f? d. what is the domain of f? e. List

22. ## Economics

Consider the simple economy of Behr, whose government does not tax its citizens. The consumption function of Behr is given by: C=500+.8Y, where Y is income. the autonomous consumer spending in this economy is: A. \$1000 B. \$800 C. \$500 D. \$.80 E. \$1800

23. ## algebra

A boat on a river travels downstream between two points, 70 mi apart, in one hour. The return trip against the current takes 2 1 2 hours. What is the boat's speed (in still water)

24. ## physics

Suppose a 34.5-kg child sits 1.17 m to the left of center on the same seesaw as the problem you just solved in the PRACTICE IT section. A second child sits at the end on the opposite side, and the system is balanced.

25. ## Social Studies

If I could have some help on this question I'd appreciate it.I think the answer is B. Which problem would most likely result if banks did not exist? (1 point) People would no longer be able to save money. Money would not move through the economy very well.

26. ## Math

Given a scale factor of 2, find the coordinates for the dilation of the line segment with endpoints (–1, 2) and (3, –3)

27. ## Physics

A 500 kg cannon rests on wheels that are free to roll. The cannon fires a 2 kg cannon ball horizontally with an average force of 400 N. What is the acceleration of the cannon ball? What is the recoil acceleration of the cannon

28. ## Algebra

help me solve this equation by substitution. y^2− 4x^2 = 7 9y^2+16x^2 = 323

29. ## english

Hey I have the write the sentences in passiv. But I do not really be good in passiv... can anybody check and may axplain what passiv is? The extent of the flood-damage has surprised everyone. -> Everyone was surprised by the extent of the flood - damage.

1. The Americans formed a republic, a government in which citizens rule through a. elected representatives.*** b. monarchies. c. kingships. d. appointed representatives. 2. Convention delegates broke the deadlock between large and small states when they

31. ## Criminal Justice

Write a 200- to 300-word response describing three of the legal defenses. Include a definition of the elements of crime in your response.

32. ## Physics

A 65.0 kg ice skater moving to the right with a velocity of 2.47 m/s throws a 0.18 kg snowball to the right with a velocity of 24.3 m/s relative to the ground. (a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction

33. ## physics

An athlete whose mass is 94.0 is performing weight-lifting exercises. Starting from the rest position, he lifts, with constant acceleration, a barbell that weighs 600 . He lifts the barbell a distance of 0.50 in a time of 2.2 . Part A Use Newton's laws to

34. ## physics

A large fake cookie sliding on a horizontal surface is attached to one end of a horizontal spring with spring constant k = 375 N/m; the other end of the spring is fixed in place. The cookie has a kinetic energy of 20.0 J as it passes through the position

35. ## Physics or Math

A force F = 0.8 i + 2.5 j N is applied at the point x = 3.0 m, y = 0 m. Find the torque about the point x = -1.3 m, y = 2.4 m. Hmm, (this is essentially just a vector problem) I know you're supposed to find the position vector r and take the cross product

36. ## Physics

A file cabinet weighing 1500 N is at rest on the floor. The coefficient of static friction between the floor and the cabinet is 0.5. What is the minimum force required to make the file cabinet move horizontally

37. ## calculus

A common inhabitant of human intestines is the bacterium Escherichia coli. A cell of this bacterium in a nutrient-broth medium divides into two cells every 20 minutes. The initial population of a culture is 51 cells. (a) Find the relative growth rate.

38. ## Chemistry

The normal freezing point of cyclohexane is 6.55 C. When 0.458 g of benzophenone is dissolved in 15.0 g of cyclohexane, the freezing point is found to be 3.19 C. What is the experimental molar mass of benzophenone? (Kf cyclohexane = 20.0 C m^-1). A) 182 B)

39. ## calculus

A freshly brewed cup of coffee has temperature 95°C in a 20°C room. When its temperature is 68°C, it is cooling at a rate of 1°C per minute. When does this occur? (Round your answer to two decimal places.)

40. ## calculus

A street light is mounted at the top of a 15-ft-tall pole. A man 6 ft tall walks away from the pole with a speed of 7 ft/s along a straight path. How fast is the tip of his shadow moving when he is 45 ft from the pole? ft/s

41. ## Calculus

The critical number of the function f(x)=6xlnx is x=

42. ## calculus

Find the linearization L(x) of the function at a. f(x) = x3/4, a = 81

43. ## Economics

The slope of the consumption function equals: A. 1-MPS B. 1/(1-MPS) C. 1-MPC D. MPC/MPS E. MPS

44. ## social studies

what website should i go on to find out about Columbus

45. ## calculus

A freshly brewed cup of coffee has temperature 95°C in a 20°C room. When its temperature is 68°C, it is cooling at a rate of 1°C per minute. When does this occur? (Round your answer to two decimal places.)

46. ## Biology

hi! so for science we have to make an experiment on temperature. we have to base our experiment on the given materials (which include test tubes, aluminum foil, cotton, fan) i chose a fan and I'm thinking of doing an experiment on how the strength of wind

47. ## math

how do you go about doing place value puzzles .can you show me an example please(hundredths place,thousandths place,ones place and tenths place

48. ## chemistry

a photon has 3.3 *10-19 joules of energy. what is the wavelength of this photon?

49. ## 1 question Science check answer

4. Which is NOT a true statement? a. Not all fats are bad for you. b. Fats can increase your risk for heart disease. c. Saturated fats are liquid at room temperature. d. Unsaturated fats come mainly from plant foods. my answer is C. I that right

50. ## Algebra

I need help solving this set of equations by substitution. xy=2 3x − y + 5 = 0 I originally used (3x+5=y) and came up with (x=.333 and x=-2) but when I substitute it into the original equation I get (y=2 and y=1) and it is wrong according to my homework.

51. ## algebra

What is cubic polynomial function in standard form with zero 1, -2, and 2

52. ## Physics

A force of 25 N accelerates a body by 5 m/s2. What is the mass of the body?

53. ## Physics

An object with a mass of 50 kg is being dragged along a horizontal floor by a horizontal force of 30 N. If the friction force opposing the motion is a steady 20 N, what is the acceleration of the body

54. ## chemistry

The calcium ion carries a charge of 2+. The nitrate ion (NO3-) carries a charge of 1-. Which of the following is the correct formula for calcium nitrate? A. CaN2 B. CaNi C. CaNO3 D. Ca(NO3)2 C

55. ## physics

(a) ____Fe(s) + ____O2 (g) h____ Fe2O3(s) (b) ____H2 (g) + ____N2 (g) h____NH3 (g) (c) ____Cl2(g) + ____KBr(aq)h____Br2(l ) + ____KCl (aq) (d) ____CH4(g) + ____O2(g)h____CO2(g) + ____H2O(l )

56. ## Physics

The weight of a rock on the moon is 0.85 N. If acceleration due to gravity on the moon is 1.7 m/s2, what will be its weight on the earth

57. ## physics

(a) ____Fe(s) + ____S(s)h____Fe2S3(s) (b) ____P4 (s) + ____H2(g)h____PH3(g) (c) ____NO(g) + ____Cl2(g)h____NOCl(g) (d) ____SiCl4(l ) + ____Mg(s)h____Si(s) + ____MgCl2(s)

58. ## Dimension Personal Education

True or False: The indefinite pronouns both, few, many, and several are always plural in meaning. True..... What do you think

59. ## Geography

Is this correct? 1. The closest ocean to Mongolia is the Pacific Ocean. 2. The capital of the island nation that has the Sea of japan as its western border is Tokyo, Japan. Thank You

60. ## physics

Which of these are balenced? 2 C4H10( g) + 13 O2( g)h8 CO2( g) + 10 H2O(l) 4 C6H7N5O16(s) + 19 O2( g)h24 CO2( g) + 20 NO2( g) + 14 H2O(g) I don't understand this anyhelp would be greatly appreciated.

61. ## Physics

A disk rotates on the horizontal. A blcok is hanging from the tisc, which forms an angle with the vertical of 45 degrees while the disk turns. The radius of the disc is .1mm and the length of the string is .06 m. Determine the velocity of rotation for the

62. ## chemistry

The hydrogen carbonate ion is formed when an H+ ion combines with the polyatomic ion CO32-. What is the net charge on the hydrogen carbonate ion? A. 2- B. 1- C. 1+ D. 2+ A

63. ## physics

An athlete whose mass is 94.0 is performing weight-lifting exercises. Starting from the rest position, he lifts, with constant acceleration, a barbell that weighs 600 . He lifts the barbell a distance of 0.50 in a time of 2.2 .

64. ## english

I shall wirte what I would say, but we are speaking about modals, so I think I have to answer with them... My solutions: 1. Your teacher is carrying a pile of heavy books. Offer help. -> Shall I carry that for for? or Sorry, can I help you? 2. A friend

65. ## chemistry

A polyatomic ion is a tightly bound group of atoms that carries its own unique charge. True False I say true

66. ## math

Solve the system of equations by graphing 2x+y=8 X+3y=9

67. ## Physics

Water moves through a constricted pipe in steady, ideal flow. At the lower point shown in the figure below, the pressure is 1.70 105 Pa and the pipe radius is 2.50 cm. At the higher point located at y = 2.50 m, the pressure is 1.30 105 Pa and the pipe

68. ## Math

Freshman math question, super confused! Today while Don was swimming, he started wondering how many lengths he would have to swim in order to swim different distances. At one end of the pool, he stopped, gasping for breath, and asked the lifeguard. She

69. ## Criminal Justice

Write a 200- to 300-word response describing the concept of due process, including how it applies to the criminal justice system.

70. ## Math

Find area of triangle 11/4 yards and 4/7 yard

71. ## Statistics

Use the multiple regression equation to predict a person's salary. Assume that the variable A is the number of years of college. Assume that the variable B is the number of years of experience. Suppose the person has 7 years of college and 3 years of

72. ## mba

I have 128Mb,256MB,512MB,1GBmemory modules.which of these combinationsis the least expensive to upgrade my computer from 2GBto 8GB

73. ## chem

Gaseous iodine pentafluoride, IF5, can be prepared by the reaction of solid iodine and gaseous fluorine: • I2 (s) + 5F2 (g) → 2IF5 (g). • A 5.00 L flask is filled with 10.0 g I2 and excess F2 with the reaction proceeds to completion completely

74. ## math

An article can be bought for cash at \$20,000.00. A customer bought it on hire purchase by paying a deposit of 20%. An interest of 10% was charged on the remaining balance and he was required to pay the balance in 15 monthly installments. 1.What is the

75. ## Physics

what is a planes velocity if ithas anair speed of 18 and there is a 30 km/h wind blowing south

76. ## Physics

A 2.9 kg ball strikes a wall with a velocity of 7.5 m/s to the left. The ball bounces off with a velocity of 6.3 m/s to the right. If the ball is in contact with the wall for 0.20 s, what is the constant force exerted on the ball by the wall? _________ N

77. ## CALC #

Use Green's Theorem to evaluate F · dr. C (Check the orientation of the curve before applying the theorem.) F(x, y) = y cos x − xy sin x, xy + x cos x , C is the triangle from (0, 0) to (0, 12) to (3, 0) to (0, 0)

78. ## 8th grade social studies

Hi, I am doing a paper for school and I need to know what are some Negative and Positive Impacts of the Telegraph? I know some positives but I really need help with the negative effect of the telegraph. Can you please give me 2 or 3 positive and negative

79. ## math

george, paul, and courtney are sharing 2 grapefruits, how much does each person get?

80. ## math

In order for the percent composition of a compound to be calculated, the molar mass of the compound and the chemical formula must be determined. True False I say true

An impulse is sent from the motor neuron to a(n) _____. sensory neuron? In the part of the inner ear called the cochlea, receptors convert sound vibrations into nerve impulses. true? Involuntary actions are controlled by the ____. spinal cord? The

asked by rawr... im a dinosaur.... rawr
82. ## math

Hi my name is olivia all I wanted to ask you how to do arrays and an expanded algorithm

83. ## Physics

A gyroscope with rotational inertia 6.4 10-3 kg·m2 is precessing in a horizontal plane at 0.46 rad/s under the influence of a 0.31 N·m torque caused by a force pointing vertically downward. How fast is the gyroscope spinning on its axis?

84. ## Science

What is the wavelength of a 600Hz sound wave ( assume the speed of sound is 340 m/s )?

85. ## Algebra

HELP!!! Super confused. Here's the problem. Today while Don was swimming, he started wondering how many lengths he would have to swim in order to swim different distances. At one end of the pool, he stopped, gasping for breath, and asked the lifeguard. She

86. ## Chemistry

Consider the reaction: CO(g) + H2O (g) CO2(g)+H2(g) which of the following initial composition will NOT achieve equlibrium? a) 0.25 mol H2, 0.35 mol CO2, and 0.25 mol CO b) 0.25 mol CO, 0.75 mol H2O c) 1.0 mol of CO2 and 0.50 mol H2 d) 0.85 mol CO and 0.25

87. ## Physics

A crate with a mass of 40 kg is being dragged along a horizontal floor at a constant velocity by an applied force of 180 N. What is the coefficient of kinetic friction? (g = 10 m/s2

88. ## calculus

Water is being filled into a water tank at 22 liters/second. The base of the tank has dimensions w = 1 meter and L = 2 meter . What is the rate of change of the height of water in the tank? (express your answer in cm/sec).

89. ## World History

I need to find a current event -entertainment. Please post links below.

90. ## physics

A 14.7 kg crate is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 124.0 N parallel to the incline, which makes an angle of 11.0 ◦ with the horizontal. The coeﬃcient of kinetic friction is 0.31 and the crate is pulled a

91. ## calculus

Water is being filled into a water tank at 22 liters/second. The base of the tank has dimensions w = 1 meter and L = 2 meter . What is the rate of change of the height of water in the tank? (express your answer in cm/sec).

92. ## calculus

A boat is pulled into a dock by a rope attached to the bow of the boat and passing through a pulley on the dock that is 1 m higher than the bow of the boat. If the rope is pulled in at a rate of 1 m/s, how fast is the boat approaching the dock when it is 7

93. ## Math

Chester and Kelsey were given a box of candy to sell. Each box of candy had 24 individual packages inside. Chester sold 1/4 of the candy in the box and Kelsey sold 3/8 of the candy in the box. Which of the following describes how to find the total number

94. ## math

The quantity demanded each month of the Walter Serkin recording of Beethoven's Moonlight Sonata, manufactured by Phonola Record Industries, is related to the price/compact disc. The equation p=-0.00051x+8 (0¡Üx¡Ü12,000) where p denotes the unit price

95. ## Math

Find the absolute maximum value and the absolute minimum value, if any, of the function. g(x)=1/8x^2-4ã(x)on [0,49] maximum ? minimum ?

96. ## Math

Find the absolute maximum value and the absolute minimum value, if any, of the following function. f(x)=1/x^2+2x+8 on [-2,1]

97. ## Math

In Saturday's 8 mile race Sarah's goal was to complete 1/2 of the run in 48 minutes. After that time had elapsed Sarah had run 2/3 of the total race. Which shoes how far ahead of Pace Sarah is? A.1/6 B.3/6 C.7/8 D.2/6 A? Before Chad shared his starburst

98. ## english

I did a exercise with indirect speech, can anybody check it? 1. "Have you visited the NA?" she asked me. -> She asked me if I had visited the NA. 2. "What do you think of the hotel food?" I asked her. -> I asked her what she thought about the hotel food.

99. ## Math

If one card is drawn from a deck of cards,what is the probability the card will not be an ace? I think the answer is 1/13. Am I correct???

100. ## Us history

Can someone please give me some information on why Alfred Thayer Mayan was for imperialism? Thanks(:

101. ## Can someone check these answers...

1. Which of the following events caused immigrants to migrate north after the civil war? -the passage of the homestead act****** -the emergence of industry in cities -advances in the printing industry - the completion of the transcontinental railroad 2.

102. ## English IV

Is it true or false? A sentence is a group of words expressing a complete though and each will begin with a capital letter.

103. ## Chemistry

Discuss the effect of the 'extra' hydroxyl groups on the physical properties of diols and triols, compared to alkanols that have only one hydroxyl group. HINT: Consider the polar nature of the hydroxyl group Really need help for this!!!

104. ## Algebra 2

I've had a major brain fart..How do you get the inverse function of: f(x)= (2x-3)/(x+1) i know the answer but i don't know how to get there. Please help, thanks.

105. ## Physics

In a Bohr of a Hydrogen atom, an electron moves in a circle with a radius of 5.10(^-9) cm around a nucleus charged positive due to electrostatic force. What is the intensity of the force so that the electron has a velocity of 2.3 x 10(^8) cm/s? The mass of

106. ## English

I have to write an analysis of character in play hamlet by shakespeare. and tell what role be of this character. which character have lots of information on it? King Hamlet, Gertrude, Laertes, Horatio, Ophelia, Polonius, or Claudius. I wanted to do on

107. ## Physics

CIRCULAR MOTION A car takes a curve with 300m radius at a velocity of 60 m/s. a) Determine the change in velocity (module and direction) when it travels an arc of 60 degrees b)Compare the magnitude of the instantaneous acceleration of the car with a

108. ## math

Find the absolute maximum value and the absolute minimum value, if any, of the following function. f(x)=1/x^2+2x+8 on [-2,1]

109. ## Math

Jennifer's dad built 2 rectangular houses for each of her dogs. The first house had a length of 6 feet and a width of 4 feet. The second house had a length and a width that was 2 feet longer than the first. What was the difference in the perimeter of the

110. ## math packet

how to make 60¢ using three coins

111. ## Probability

Among a group of people, 10% are from NYC and 90% are not. All people from NYC are under 18 years old, and 60% of those not from NYC are also under 18 years old. One person is chosen at random, and he or she is under 18. What is the probability that the

112. ## Physics

I think I might be on the right track, if someone could let me know if this is correct I would greatly appreciate it. A 51 kg diver is spinning forward in a tuck position at 1.9 rev/s, as shown in Fig. 13-38a. In this position, the diver's rotational

113. ## math

a retail jeweler sells a pair of gold earrings for \$213.90. The jeweler uses a 130% markup based on cost. Based on this information, what was the wholesale cost of the earrings

114. ## Dimension Personal Education

Select the sentence that does not have a pronoun-antecedent error. 1. Most moviegoers like to bring his own snacks to save money. 2. Most moviegers like to bring their own snacks to save money

115. ## Biology 100

1. What did you observe for the carrying capacity of each species?

116. ## Physics

A uniform, solid, spherical asteroid with mass 1.2 * 10^13 kg and radius 1.0 km is rotating with a period of 4.6 hours. A meteoroid moving in the asteroid's equatorial plane crashes into the equator at 9.0 km/s. It hits at a 58° angle to the vertical and

117. ## math

a basketball player had scored 888 pts in 31 games. at this rate, how many games will it take him to score 1500pts?

118. ## math

a nutritional chart on the side of a box of a cereal state that there are 84 calories in a 3/4 cup serving. how man calories re in 5 cups of the cereal?

Among a group of people, 10% are from NYC and 90% are not. All people from NYC are under 18 years old, and 70% of those not from NYC are also under 18 years old. One person is chosen at random, and he or she is under 18. What is the probability that the

120. ## statistics

1. A bag of colored blocks contains the following assortment of colors: red (13), blue (12), orange (21), purple (14), green (14), and yellow (6). Construct the probability distribution for x.

121. ## statistics

Which of the following situations can be best modeled using a continuous distribution? a) Number of heads in 10 flips of coin. b) Number of customers/hr. c) Time between arrivals of two customers. d) Yes or no answer. e) Number of product defects/hr.

122. ## Calculus

It is given that a differentiable function f(x)=4x^3+kx^2-36x-15 (k is a constant) is decreasing on -3/2

123. ## English

I have to choose which word "neatly" is describing. If neatly is an adverb would it be describing packed? everything owned packed boxes I saw that everything we owned was neatly packed in cardboard boxes.

124. ## sociology

what role does intrapersonal and interpersonal play in criminal justice?

125. ## Human Anatomy

how does cystic fibrosis affect your digestive system? and what exactly is cystic fibrosis? I know it has something to do with the lungs. thanks in advance! ♥dino♥

asked by rawr... im a dinosaur.... rawr
126. ## Math

Is this correct? If one card is drawn from a regular deck of cards,what is the probability the card will not be an ace? 1/13 is the probability

127. ## Chem

Potassium ferricyanide has an extinction coefficient of 1020 1/M*cm at 420 nm. The absorbance of a sample of unknown concentration at 420 nm is 0.4268. If the path length is 10 mm, determine the concentration of the sample

128. ## Dimension Personal Education

True or False The indefinie pronouns all,any, more, most, and some are alwas singular in meaning

129. ## statistics

A researcher administered a treatment to a sample of participants selected from a population of 80. If the researcher obtains a sample mean of M=88. Which combination of factors is most likely to result in rejecting the null hypothesis? a, alpha level=0.01

130. ## statistics

A normal distribution has a mean of 36 and standard deviation of 4. What proportion of the distribution consisted of scores between x=34 and x=38? a, 0.6915 b, 2(0.3085)=0.6170 c, 0.1915 d, 2(0.1915)=0.3930

131. ## math

If there is a 75.0 g quantity of carbon present in each 100 g of a carbon and hydrogen compound, what is the percent composition of hydrogen in this compound? A. 25 g B. 25% C. 75 g D. 75% I say B

132. ## math

127.1 g Cu combines completely with 32.1 g S to form a compound. What is the percent composition of this compound? A. 20% Cu; 80% S B. 50% Cu; 50% S C. 80% Cu; 20% S D. 127% Cu; 32% S I say A

133. ## math

When solving for the percent composition of a given compound, the percent of each element in the compound must be found and reported. True false TRUE

134. ## Accounting

In 20X0, ABC company purchased machine for \$300,000 that had a useful life of 5 years, with a salvage value of \$50,000 at the end its life. Depreciation was calculated over 2 years on straight-line basis. In 20X2, it determined that the total life should

135. ## MATH

Without taking a single break, mercedes hiked for 10 hours, up a mountain and back down by the same path. While hiking, she averaged 2 miles per hour on the way up and 3 miles per hour on the way down. How many miles was it from the base of the mountain to

136. ## English Hamlet

I writing global statements on themes in play hamlet, i trying to write one on betrayal, but its not turning out like i want it. Having loved and trusted those that mean the world to us and getting stabbed by them in the backs is the worst betrayal that

137. ## math

determine the common difference in the squence x,x+1,x+2,x+3..

138. ## Calculus

∫(integral) from 3 to 6 of [(x^3 + 5)/x] dx =?

139. ## Calculus

ln(x+8)+ln(x–8)=0 x=?

140. ## Calculus

Find the solutions of the exponential equation e^2x–4e^x+3=0 x1=? x2=?

141. ## Math

Given a scale factor of , find the coordinates for the dilation of the triangle with vertices at (0, 0), (0, 2) and (4, 0).

142. ## Math

Solve the puzzle =RIGHT(LEFT(\$B\$2,84),1) =RIGHT(LEFT(\$B\$2,17),1) =RIGHT(LEFT(\$B\$2,138),1) =RIGHT(LEFT(\$B\$2,2),1) =RIGHT(LEFT(\$B\$2,234),1) =RIGHT(LEFT(\$B\$2,138),1) =RIGHT(LEFT(\$B\$2,4),1) =RIGHT(LEFT(\$B\$2,173),1) =RIGHT(LEFT(\$B\$2,2),1)

143. ## Math

Gina uses a magnifying glass to look at bugs. A caterpillar that is 2 inches long appears 4.5 inches long through the glass. What is the scale factor?

144. ## Social Studies

Can someone help me proofread this? Industrial Inventors The Industrial Revolution began in England in the 18th century and ended in the 19th century. It began in England and then spread throughout the world. There were many changes in agriculture, trade

145. ## Algebra

Solve the linear inequality 5- 7/6x greater than or equal to 7

147. ## health

What is stress management? A. Controlling and reducing the tension that occurs in stressful situations B. Controlling and reducing the tension that occurs in peaceful situations C. Controlling and reducing the happiness that occurs in peaceful situations

148. ## Lang. Arts 2 questions

9. What is the simple subject in the sentence below? My first dog was afraid of thunderstorms. a. dog b. first dog c. of thunderstorms d. thunderstorms 10. What is the complete predicate in the sentence below? Your sister Erin wrote a fantastic essay about

149. ## MATH

When a certain rectangle is folded in half, it forms two squares. If the perimeter of one of these square is 28, what is the perimeter of the original rectangle?

150. ## AP Physics B

An air puck of mass 0.102 kg is tied to a string and allowed to revolve in a circle of radius 1.06 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 0.78 kg is tied to it. The

151. ## Chem

If 19.0 of gas has a temperature of 320 and a pressure of 550 , what is its volume?

152. ## AP Physics B

A penny of mass 3.1g rests on a small 28.2g block supported by a spinning disk of radius 12cm. The coefficients of friction between the block and disk are .73 (static) and .64 (kinetic) while those for the penny and black are .6 (static) and .45 (kinetic).

153. ## Physics

A ball of mass m makes a head-on elastic collison with a second ball (at rest) and rebounds in the opposite direction with a speed equal to 1/4 it's original speed. What is the mass of the second ball? I would really apprieciate it if ya'll would show

Answer the following function. f(x)=2x^2-x-1 A. Is the point (-2,9) on the graph of f? B. If x equals 2, what is fx? What point(S) are on the graph of f? c. if f(x)= -1, what is x? what point(s) are on the graph of f? d. what is the domain of f? e. List

155. ## Sociology

This unit we learned about the various social statuses in the U.S. Identify and describe each status. How are they similar and how do they differ? Into which social status do you fit and why do you feel this way

156. ## math

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. y=e^1x, y=e^4x, x=1

157. ## Finance

If a toy co. has sales of \$539,000 and a profit margin of 5%, and a capital intensity ratio of 1.2. What is the asset turnover rate?

158. ## Chem

ndicate which species in each pair has the higher ionization energy. Choose at least one answer. a. Between K and I, I b. Between K and I, K c. Between Al and Al+, Al d. Between Al and Al+, Al+ e. Between Ar and Cl-, Ar f. Between Ar and Cl-, Cl- g.