# Questions Asked onJuly 27, 2011

1. ## Math

The formula h=48t-16t^2 gives the height, h, in feet, of an object projected into the air after t seconds. If an object is propelled upward, at what time(s) will it reach a height of 32 feet above the ground?

2. ## Statistics

If mean of 1, 2, 3, --------- n is 6n/11, then n is

3. ## Physics

An object 0.600 cm tall is placed 16.5 cm to the left of the vertex of a concave mirror having a radius of curvature of 22.0 cm. (a) Draw a principle-ray diagram showing the formation of the image. (b) Calculate the position, size, orientation (erect or

4. ## Math

Jane has only \$1 and \$5 in her wallet, and they total \$79.00. If she has a total of 23 bills, how many of each bill does she have?

5. ## ORGANIC CHEMISTRY 2

Ethanol has boiling of 78.5 while dimethyl ether has boiling point of -24.9;so account for this diffrence in boiling points since they both have the same molecular weight.how can this be explained using diagrams?

6. ## Math

A boat, which moves at 18 mph in still water, travels 14 miles downstream in the same amount of time it takes to travel 10 miles upstream. Find the speed of the current.

7. ## Math

A certain mass is supported by a spring so that it is at rest 0.5 m above a table top. The lowest position of the mass is 0.1 m, and the highest position is 0.9 m. The mass is pulled down 0.4 m at time =0, creating a periodic up and down motion. It takes

8. ## Physics

A 400.0-m-wide river flows from west to east at 30.0 m/min. Your boat moves at 100.0 m/min relative to the water no matter which direction you point it. To cross this river, you start from a dock at point A on the south bank. There is a boat landing

9. ## differential calculus

a right circular cylinder has a fixed height of 6 units. Find the ratio of change of its volume(v) with respect to the radius(r) of its base.

10. ## CONTACTS,CONFLICTS,AND THE CRUCIBLE

As a result of his stay in Cairo, Mansa Musa caused

11. ## physics

one electron travels twice as fast as another. Which has the longer wavelength?

12. ## Physics

A uniform crate with a mass of 16.2 kg rests on a floor with a coefficient of static friction equal to 0.571. The crate is a uniform cube with sides 1.21 m in length. what is the minimum height where the force F can be applied so that the crate begins to

13. ## Physics-Need Help fast!

Part 1 A 3m long pipe is in a room where the temperature is 20 degrees C. What is the frequency of the first harmonic if the pipe is closed at one end? Part 2 sound traveling in air at 23 degrees C enters a cold front where the air temp is 2 degrees C. If

14. ## MATH

A parking lot has 5 spots remaining and 5 different cars in line waiting to be parked. If one of the cars is too big to fit in the two outermost spots, in how many different ways can the five cars be arranged?

15. ## Statistics

The Computer Anxiety Rating Scale (CARS) measures an individual's level of computer anxiety, on a scale from 20 ( no anxiety) to 100 (highest level of anxiety). Researchers at Miami University administered CARS to 172 business students. One of the

16. ## Physics

Babe Ruth steps to the plate and casually points to left center field to indicate the location of his next home run. The mighty Babe holds his bat across his shoulder, with one hand holding the small end of the bat. The bat is horizontal, and the distance

17. ## Physics

A speedboat, starting from rest, moves along a straight line away from the dock. The boat has a constant acceleration of +3.00 m/s2. A siren on the dock is producing a 755 Hz tone. Assuming that the air temperature is 20.0oC, what is the frequency of the

18. ## Math

Each of the numbers 0 through 26 is written on a piece of paper and all of the pieces of paper are placed in a hat. One number is selected at random. Determine the probability that the number selected is even. Note: 0 is considered an even number. I think

19. ## maths

how to solve cos70/sin20+cos57cosec33-2cos60?

20. ## algebra

An artifact was found and tested for its carbon-14 content. If 79% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

21. ## Math

The length of a rectangle is 6 inches less than 3 times its width. Find the dimensions of the rectangle if its area is 45 square inches.

22. ## math

A rectangular poster has an area of 190in(squared). The height of the poster is 1in. less than twice its width. Find the dimensions of the poster.

23. ## MATH

Consider the Venn diagram below. The numbers in the regions of the circle indicate the number of items that belong to that region. (2 intersecting circles A & B, where A part is 50, B part is 110, and the intersecting part is 40) Determine: n(A) n(B) P(A)

24. ## physics

describe the force board experiment to show how to obtain the resultant of two non-parallel coplanar force acting at a point.four forces of magnitude 10N, 5N, 4N, AND 6N acts on an oblect in the direction north. West, east and south respectively.find the

25. ## Psychology

The testing company has hired qualified peopl in the field to administer thenew test bank to subjects of different ages and ethnic backgrounds. They need a sizable number of scores from inner city, urban and country/small town subjects. Their goal is to

26. ## PreCalc - Sequence

A ball is dropped from a height of 20 ft and always rebounds 1/4 of the distance fallen. A. write a sequence for the first 3 rebound heights B. How high is the 6th rebound? C. Find the sum of all possible rebounds. I keep getting numbers that are too high.

27. ## physics

A 3.0-m-long rigid beam with a mass 130 kg is supported at each end. An 90 kg student stands 2.0 m from support 1. (beam 1 is to the left, and beam 2 is on the right.) How much upward force does support 1 exert on the beam? How much upward force does

28. ## math

M4 Rules of Differentiation Exercise Set 3.1 (4, 10, 26, 60) Exercise Set 3.2 (18, 36, 42, 48, 66) Exercise Set 3.3 (12, 26, 38, 50) Exercise Set 3.4 (6, 10, 22, 52, 82) Exercise Set 3.5 (8, 28, 54)

29. ## Statistics

Mean of n numbers X1, X2,--------Xn is m. If Xn is replaced by x the new mean is

30. ## Math

I need to figure out if 57 people took a survey and 3 of them scored a (3), 31 of them scored a (4) and 23 of them scored a (5), what was the average score and how did you figure that out?

31. ## Chemistry

What type of isomers are [Pt(NH3)2Br2]Cl2 and [Pt(NH3)2BrCl]BrCl? A. Structural B. Geometric C. Linkage D. Coordination E. Optical

32. ## SCIENCE

a traffic light is supported by a cable that makes ang angle of 7 degree w/ the horizontal on each side of weight. what is the maximum safe weight of the light if the maximum safe tension in the cable 1200N

33. ## Economics

Annual demand and supply for the Entronics company is given by: QD = 5,000 + 0.5 I + 0.2 A - 100P, and QS = -5000 + 100P where Q is the quantity per year, P is price, I is income per household, and A is advertising expenditure. a. If A = \$10,000 and I =

34. ## differential calculus

Find how fast (a) the circumference (b)the area, if a cicle increases when the radius increases.

35. ## Math

Use the information provided to write the vertex form equation of each parabola. a)y + 60x + 294 = -3x^2 b)−(y+1) = (x−4)^2

Consider the Venn diagram below. The numbers in the regions of the circle indicate the number of items that belong to that region. (2 intersecting circles A & B, where A part is 50, B part is 110, and the intersecting part is 40) Determine: n(A) n(B) P(A)

37. ## chemistry

nonane has a density of 0.79 g/mL and boils at 151 celsius. will it float or sink in water (density of 1.00 g/mL)

38. ## Statistics

Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?

39. ## Math

How much of 20% alcohol solution and 50% alcohol solution must be mixted to get 9 liters of 30% alcohol solution?

40. ## Physics

On a warm day (92°F), an air filled

41. ## economics

Should development around the world be a higher priority to the rich countries?

42. ## Math

Tickets to a game are \$5 for adults and \$2 for children. Six hundred tickets are sold for a total of \$2160. How many adult tickets and how many children's tickets have been sold?

43. ## Physics

On a warm day (92°F), an air filled

44. ## Writing

My sister had asked me for some money to help get her out of debt. I did not feel right just giving her the money. My sister gathered all of her (possessive pronoun) credit card bills, and we sat down together to look over them. We found out that she

45. ## Math

Consider the Venn diagram below. The numbers in the regions of the circle indicate the number of items that belong to that region. (2 intersecting circles A & B, where A part is 50, B part is 110, and the intersecting part is 40) Determine: n(A) n(B) P(A)

46. ## economics

What are some ways that the lack of development in the world affects us?

47. ## physics

What is meant by the term uniform electric field?

48. ## Statistics

The mean and median of 100 items are 50 and 52 respectively. The value of the largest item is 100. It was later found that it is 110, not 100. The true mean and median are a) 50.1, 52 b) 50, 52 c) 50.2, 52 d) None of these

49. ## Statistics

The algebraic sum of the derivations of a frequency distribution from its mean is i) Always positive ii) Always negative iii) Zero iv) A non zero number

50. ## Globalization

What are the main questions that the Commanding Heights series is posing about globalization and economics and how does it fit into the concept of development?

51. ## Psychology

"How are a cat and a dog alike?" An answer to this question requires: a)crystallized intelligence b)intrapersonal intelligence c)fluid intelligence d)Eastern intelligence I think c

52. ## Psychology

"Who was the first vice president of the United States". the correct answer to this question requires: a) Crystallized intelligence b) intrapersonal intelligence c) fluid intelligence d) Eastern intelligence I think a

53. ## Math modeling

Write the formula for an exponential function with initial value 24 and growth factor 1.4

54. ## Physics

Hi, I need to know how much ground water presuure would be required to lift a 1.200m diameter plastic tank weighing 650kg out of the ground please, Please supply the answer in Kpa or psi Cheers

55. ## Psychology

The experimental rats were being raised in separate environments. One group lived in a traditional cage in a quiet, well-lit room. They were supplied with plenty of food and water. The second group inhabited "Rat Disney Land". There were colorful toys,

56. ## Math

Express fraction as a percent

57. ## Chemistry

How do i calculate plate number, distribution constant, mobile phase and stationary phase volume for tlc not HPLC/ GC

58. ## math

help solve x + 1/6= 1/3 thanks

59. ## Life Orientation

In 10-15 lines critically discuss 5 ways in which the Xenophobia impacts on the community.

60. ## colleege homework help

In F. Scott Fitzgerald's story "Bernice Bobs Her Hair," we are very likely to

61. ## Psychology

The entire class was in an uproar. The teaching assistant had proctored the exam while the professor was attending a conference, and the test seemed unrelated to the chapters that they had studied. The students' complaints are based on the test's lack of:

62. ## maths

The perimeter of a farm in a shape nf a square what is the length of 1 side the farm ?show all calculations

63. ## maths

The perimeter of a farm in a shape of a square is 3,5km what is the length of 1 side the farm ?show all calculations

64. ## English

I changed it from moreover to and. Correct? They told him that he was never going to be anyone important because of a name like his, and because of the way he looked and dressed.

65. ## Spanish--CHECK PLEASE (POR FAVOR)!

Help please, are all my answers correct? Distingue entre todos los usos con se en las oraciones a continuación. 1) Allí es donde _______ coches/carros/autos de Europa. Vamos mañana para buscar uno para comprar. A) fueron vendidos B) se venden C) se me

66. ## Chemistry

Serine exists in its zwitterion form at a pH of 5.7. Draw the structural formula for the same. Explain the manner in which the structural formula of polar and non-polar amino acids would vary

67. ## math

find the lateral surface of the frustum of a cone 6inches high with upper and lower bases 11inches and 7inches in diameter respectively

68. ## Math/116

I need some help with my math lab week 7

69. ## Chem 101

How many calories are required to raise the temperature of 24.4 g of water by 27.8°C

70. ## Math

Suppose an individual makes an initial investment of \$2400 in an account that earns 8%, compounded monthly, and makes additional contributions of \$100 at the end of each month for a period of 12 years. After these 12 years, this individual wants to make

71. ## Is this correct?

is this correct? Completely factor the following expression: 64y^2-49z^2 Is the answer: 128 y-49

72. ## math

How do you find the nth term in a sequence of numbers if the values are increasing then decreasing? Ex. 1: -2, 3: 10, 5: -18

73. ## Can someone help me with this one Please! :)

factor out the greatest common factor -36m^2n^3-60mn^4+18m^4n^2

74. ## chemistry

If 50.0 grams of copper metal is added to a silver nitrate solution, what mass of silver is produced if copper 2 nitrate is also formed?

75. ## MATH!

is this correct? Completely factor the following expression: 64y^2-49z^2 Is the answer: 128 y-49

76. ## science

why potassium stock with 10000mg/L is added to the sodium standard solution with 20mg/L during the preparation for aas?

77. ## math

factor out the greatest common factor -36m^2n^3-60mn^4+18m^4n^2

78. ## physics

A spring exerts a 17 N force after being stretched by 3.0 cm from its equilibrium length. By how much will the spring force increase if the spring is stretched from 5.0 cm away from equilibrium to 6.0 rm cm from equilibrium? I don't know how to approach

79. ## physics

in what specific way does light from distant stars and galaxies tell astronomers that atoms throughout the universe have the same properties as those on earth?

80. ## finance

rRF = 5.0%; MRP = 5.0%; and b = 1.1. Based on the CAPM approach, what is the cost of equity from retained earnings?

81. ## physics

Consider a boy standing on a building that is 500m height and another boy standing on the ground. If the boy on the ground throws a ball to the boy standing on the building, with what vertical velocity must the ball be thrown such that it reaches the boy

82. ## HUMA 215

Sayre posits that the vocabulary associated with romantic love, as it is known today, came into being during the Medieval Period. The troubadour or trobairitz, accompanied by lyre or lute, would recite poems about the feelings associated with this type of

A clear explanation of the consequences of this human factor

84. ## Math

Describe in your own words how to solve a linear equation or inequality

85. ## differential calculus

a right circular cylinder has a fixed height of 6 units. Find the ratio of change of its volume(v) with respect to the radius(r) of its base.

86. ## law

Choose a current federal, state, or local issue that directly affects public policy pertaining to the criminal justice system. Prepare a 700- to 1,050-word paper in which you analyze the issue and related policy. Be sure to address to following points in

87. ## science

how long does it take to dissolve 3 ice cubes in a glass of water

88. ## Physics

A train compartment of size 4m and 3m is moving on a horizontal track. A man fires a shot from outside with a velocity 10 m/s at an angle 53' with the track. A person sitting inside the compartment observe the bullet one corner to diagonally uposite coner.

89. ## economics

A village has n fishermen who exploit the sea nearby and sell their catch at market price (assumed constant). The extraction technology displays decreasing returns to scale and is a=e^-1/2 where e is the total effort. 1) What is the optimal behavior for

90. ## math

a liquid form of penicillin is sold in bulk at a price of \$ 200 per unit.If the total cost for x unit is C(x)=500000+80x+0.003X^2 and the production capacity is at most 30000 at a specified timed, how many of the penicillin must be manufactured and sold in

92. ## english

Please explain the line, "Be prompt without being stubborn,refuse without arguments,clothe weighty matters in a motley garb."

93. ## geometry

Write a two column proof. Given CE = CA, EB and AD are medians, Prove: EB = AD for a triangle

94. ## Maths

find the profit if a student sell 30 shirts and 50 caps

95. ## English

I have made the changes. Is this better? Thesis- The sloppily dressed, wealthy businessman, who now has the state-of-the-art mansion, but because of his penny pinching ways, no one would ever know it. Paragraph #2 Granted Oliver Toliver wasn’t a very

96. ## Finance

Dr. Whitten has decided to purchase equipment that has a cost of \$60,000 and will produce a pretax net cash inflow of \$30,000 per year over its estimated useful life of six years. The equipment will have no salvage value and will be depreciated by the

97. ## statistics

Suppose the following summary statistics are obtained from a large group of individuals:X =52.0, Sx= 8.7, Y =147.3, Sy = 16.9. Dorothy receives an Xscore of 52. What is her predicted Y score if r = o?

98. ## Physics

An object, that is 3.25 mm high is placed 16 cm in front of a lens. The image produced by this lens appears 6.0 cm behind the object, as the figure shows. (a) What is the focal length of this lens and what type of lens is it? (b) What is the height of the

99. ## science

how does social and cultural influences influence science education

help needed

101. ## Earth Science

In what ways can sea level be lowered? What effect might this have on existing life forms? I can't find it in my textbook. Can somebody helps??????? THANKS A LOT!!!!!

102. ## education

Create an outline of your Educational Debate Persuasive Paper. The outline should be based on one of the educational debates found in Appendix A and should highlight the main points of your paper. Include an annotated bibliography of at least three sources

103. ## Statistics

Determine the upper-tail critical values of F in each of the following two-tail tests: Á) á= 0.10, n1 = 16,n2 = 21 B) á = 0.05, n1= 16,n2 = 21 C) á= 0.01, n1 = 16,n2 = 21

104. ## statistics

suppose we selected a random sample of five woman from our school measure the height of each and calculated the sample mean if we wished to know whether the height of woman at our school is typical of height of women inourtown how should we compare our

105. ## Economics

Unable to find any info to answer my question I recently posted about.. role of economic theory in the way economics are run today & no clue found as to concrete examples of same...went through all your sites you suggested and looked many, many sites

106. ## Math

Evaluate 5^C3

107. ## Math-confused!

A disc jockey has 12 songs to play. Seven are slow songs, and five are fast songs. Each song is to be played only once. In how many ways can the disc jockey play the 12 songs if: *The songs can be played in any order. *The first song must be a slow song

108. ## Math

Mary purchased a package of 13 different plants, but she only needed 9 plants for planting. In how many ways can she select the 9 plants from the package to be planted?

109. ## Psychology

If the concept is a truck, the prototype may be: a) a Ford pickup b) bulldozer c) an eighteen-wheeler d) personnel carrier I think c

110. ## Psychology

If the prototype is block or ball, the concept is: a) construction b) toy c) child d) play I think b

111. ## algebra

The half-life of 234U, uranium-234, is 2.52 multiplied by 105 yr. If 98.8% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?

112. ## algebra

The half-life of 234U, uranium-234, is 2.52 multiplied by 105 yr. If 98.8% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?

113. ## physics

A man starts running a race with velocity v. in the begining of race he finds wind is blowing at an angle alpha with the track. As he progress straight horizontal road wind appears to rotate uniformly and by the gime he completes the race wind appears to

What types of technology do people utilize to communicate? How does technology change the way people communicate? What does technology bring to communication other than the technology itself?

115. ## Economics

What is the role of economic theory in the way economies are run today? Give some concrete examples.

116. ## Spanish

Help please, are all my answers correct? Distingue entre todos los usos con se en las oraciones a continuación. 1) Allí es donde _______ coches/carros/autos de Europa. Vamos mañana para buscar uno para comprar. A) fueron vendidos B) se venden C) se me

117. ## math 104

log_(9) \(73\)

118. ## engllish

Even after achieving such wealth, Oliver has always remained true to himself and never allowed his beliefs to waver. Correct?

119. ## Algebra

if p-28=10/3(h-5) how in the world do I figure out how many pounds of oranges a 18ft & 20 ft tree would make. I can get this far and just can catch onto the rest. Please help!

120. ## physics

assume that a hailstone at 0 degrees celsius falls through air at a uniform temperature of 0 degrees celsius and lands on a sidewalk also at this temperature. from what initial height must the stone fall in order to entirely melt upon impact?

121. ## math

what is the sum of 5/16 and 7/8

122. ## STATISTICS (2 Questions)

Show all work. Any answer given with just an answer will be counted wrong. Also, Show the graph and shaded region as needed or it will be counted wrong. Make sure to answer the question using the steps of hypothesis testing. a.) state the hypothesis, b.)

katleho has a flair for languages and obtains good grades in these. She is an avid reader and spends a large portion of her allowance on magazines. She is a member of the school's debating team. She loves working with people and socialising with her peers,