# Questions Asked onMarch 25, 2011

1. ## algebra investments

Peter invested some money at 6% annual interest and martha invested some at 12%. If their investments is \$6000 and their combined interest was \$540. How much money did martha invest?

2. ## physics

a 0.75 kg mass attached to avertical spring streches the spring 0.30m. what is the spring constant? the mass-spring system is now placed on the horizontal surface and set vibrating. what is the period of the vibration?

3. ## chemistry

A gas is confined to a container with a massless piston at the top. (Part C figure) A massless wire is attached to the piston. When an external pressure of 2.00 atm is applied to the wire, the gas compresses from 4.90 to 2.45 L. When the external pressure

4. ## Math

Tatum Company has four products in its inventory. Information about the december 31, 2009, inventory is as follows: product total total total Net cost replacement realizable cost Value 101 \$120,000 110,000 100,000 102 90,000 85,000 110,000 103 60,000

5. ## physics

Find the linear speed of the bottom of a test tube in a centrifuge if the centripetal acceleration there is 5.5×104 times the acceleration of gravity. The distance from the axis of rotation to the bottom of the test tube is 8.0 .

6. ## MATH

If 20% of population have blue eyes, and 5 people are selected at random, what is the probability that at least 4 of them have blue eyes? HOW DO I FIND THE SOLUTION TO THIS PROBLEM?

7. ## physics

A disk with a mass of 29 kg and a radius of 31 cm is mounted on a frictionless horizontal axle. A string is wound many times around the disk and then attached to a 70-kg block, as shown in the figure. Find the acceleration of the block, assuming that the

A skydiver is subject to two forces: gravity and air resistance. Falling vertically, she reaches a constant terminal speed at some time after jumping from the plane. Since she is moving at a constant velocity from that time until her chute opens, we

9. ## physics

A solid ball of mass m and radius r rolls without slipping through a loop of radius R, as shown in the figure. From what height h should the ball be launched in order to make it through the loop without falling off the track? (Use any variable or symbol

A thin uniform rod (length = 1.3 m, mass = 4.1 kg) is pivoted about a horizontal frictionless pin through one of its ends. The moment of inertia of the rod through this axis is 1/3 m L2. The rod is released when it is 55° below the horizontal. What is the

11. ## World Geography

Which of these statments describe NATO? 1. NATO's preferred method for resolving conflict is through military defense. 2. NATO's original purpose was to defend its members from Soviet aggression. 3. NATO's members include the U.S. and Canada. 4. NATO was

12. ## Spanish

1. Choose the correct Spanish translation for: “Vincent introduced himself to Rose.” A. Vicente me presentó con Rosa. B. Vicente presentó Rosa él. C. Vicente se presentó con Rosa. D. Vicente me presentó Rosa. 2. Choose the correct Spanish

13. ## math

how do you find ...weekly sales in thousands of items of a product has a seasonal sales record approximated by y=18.1sin(piex/24)+52.9 where x is time in weeks and 1 is the first week in janurary. during which weeks will the sales equal 61,950 items this

14. ## earth science

During an earthquake, the ground surface ____.

15. ## calculus

A spherical balloon is being inflated at a rate of 10 cubic inches per second. How fast is the radius of the balloon increasing when the surface area of the balloon is square inches? Enter your answer correct to 3 decimal places.

16. ## physics

A centrifuge takes 1 minute to turn through 20 complete revolutions before reaching it's final speed. What is the angular acceleration (assumed constant) and what was it's final angular speed in rpm? How do I solve this without knowing the radius of the

17. ## Math

Herman Company has three products in its ending inventory. Specific per unit data for each of the products are as follows: Product1 product2 product3 cost \$20 \$90 \$50 replacement cost 18 85 40 selling price 40 120 70 disposal costs 6 40 10 normal profit

18. ## uog

A survey of an urban university (population of 25,450) showed that 750 of 1100 students sampled attended a home football game during the season. What inferences can be made about student attendance at football games? Using the 90% level of confidence, what

19. ## bus stats

A manufacturing company has 5 identical machines that produce nails. The probability that a machine will break down on any given day is .1. Define a random variable X to be the number of machines that will break down in a day. a. what is the appropriate

20. ## Statistics

1. The scores of students on the ACT college entrance examination in a recent year had a normal distribution with a mean of 18.6 and a standard deviation of 5.9. A simple random sample of 60 students who took the exam is selected for study: a) What is the

1) Suzie (of mass 38 kg) is roller-blading down the sidewalk going 20 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 2 seconds. What is Suzie’s average acceleration?

22. ## Chemistry

1. What is the percent by mass of a solution that contains 50 grams of solute dissolved in 200 grams of solution? What is the concentration of the same solution in parts per million? 2. What is the percent mass of a solution that contains 75 grams of salt

23. ## physics

Two electrostatic point charges of +30 ìC and +25 ìC exert a repulsive force of 200 N on each other. What is the distance between the two charges?

24. ## chemistry

Lead pipes were once used to transport drinking water and are still found in some older homes and city water systems. Suppose the lead concentration and pH of the water determined by lead (II) hydroxide (Ksp = 2.8x10^-16) dissolving to produce a saturated

25. ## physical science

in a balanced chemical equation the mass of the reactants is equal to the? a. atoms in a molecule b. atomic mass of the elements c. volume of the reactants d. mass of the products

26. ## Discrete Math

Theorem: For every integer n, if x and y are positive integers with max(x, y) = n, then x = y. Basic Step: Suppose that n = 1. If max(x, y) = 1 and x and y are positive integers, we have x = 1 and y = 1. Inductive Step: Let k be a positive integer. Assume

27. ## Economics

U.S. Pharmaceutical of Korea* U.S. Pharmaceutical of Korea (USPK) was formed in 1969. Its one manufacturing plant is located just outside Seoul, the capital. Although the company distributes its products throughout South Korea, 40 percent of its total

28. ## financial management

Your investment adviser has sent you three analyst reports for a young, growing company named Vegas Chips, Incorporated. These reports depict the company as speculative, but each one poses different projections of the company’s future growth rate in

29. ## chemistry

Calculation of )Hf0 for Mg2+(aq.) 1. Assume the heat capacity of the final solution is 3.92 J K-1 g-1. Using the mass of the HCl solution, calculate qcontents from equation (4.6). Calculate qsystem from equation (4.5). 2. Calculate the moles of Mg2+

30. ## science

a current can be induced in a closed circuit without the use of a battery or an electrical power supply by moving the circuit through a?

31. ## Chemistry

50.0mL of 0.200M HCl diluted to 100.0 mL and titrated with 0.200M NaOH. what is total volume of solution(L) if volume of NaOH added(mL) are 0.00, 5.00, and 10.0

32. ## Physics

Use Bernoulli's equation to estimate the upward force on an airplane's wing if the average flow speed of air is 195 m/s above the wing and 162 m/s below the wing.

33. ## Chemistry for Engineers

A gas is confined to a container with a massless piston at the top. (Part C figure) A massless wire is attached to the piston. When an external pressure of 2.00 atm is applied to the wire, the gas compresses from 4.90 to 2.45 L. When the external pressure

34. ## physics

Initially sliding with a speed of 2.3 , a 1.7 block collides with a spring and compresses it 0.26 before coming to rest.What is the force constant of the spring?

35. ## bus stats

John parks cars at a hotel. On the average, 6.0 cars will arrive in an hour. A driver's decision on whether to let John park the car does not depend upon any other person's decision. Define the random variable X to be the number of cars arriving in any

36. ## Chemistry

A radio wave has a wavelength of 1.0 km. What is the radio frequency? 0.30 MHz 300 KHz 3.0 MHz 30 KHz

37. ## physics

A solid ball and a hollow ball, each with a mass of 6 kg and radius of 0.1 m, start from rest and roll down a ramp of length 3 m at an incline of 31°. An ice cube of the same mass slides without friction down the same ramp. What is the speed of the ice

asked by need help as soon as possible
38. ## physics

A demonstration gyroscope consists of a uniform disk with a 39-cm radius, mounted at the midpoint of a light 56-cm axle. The axle is supported at one end while in a horizontal position. How fast is the gyroscope precessing, in units of rad/s, if the disk

A company has operating costs of \$2000 per thousand items produced. Its revenue function can be modeled by the equation: R(x)=30x/(x+2)² , where x is measured in thousands of items produced, and C and R are measured in thousands of dollars (so C(x)=2). 1.

40. ## calculus

A ball is thrown upward with an initial velocity of 96 feet per second from the top of a 100 foot building. (a) When well the ball attain its maximum height? (b) When will the ball hit the ground? Give a decimal answers correct to 2 decimal places

41. ## math

If \$20,000 is invested in a savings account offering 3.5% per year, compounded continuously, how fast is the balance growing after 4 years? (Round your answer to the nearest cent.) \$ 1 per yr

42. ## bus stats

A deck of playing cards contains 52 cards, four of which are aces. What is the probability that the deal of a five-card hand provides: a. What is the appropriate probability distribution for X? Explain how X satisfies the properties of the distribution. b.

43. ## Spanish

Can you double check if I followed the directions correctly this time too and the answers were correct. Give the correct form of the appropriate verb, saber or conocer, which would be used in writing the following sentences in Spanish.Be sure the verb is

44. ## chemistry

Based on their molecular structure, why are these acids thes stronger of the two binary acids given? HCl stronger than HF HF stronger than H2O H2Se stronger than H2S Is this because of bond strength due to placement on the table of elements? thanks

45. ## math

A bicycle wheel travels about 82 inches in 1 full rotation. What is the diameter of the wheel, to the nearest inch?

46. ## math

A hollow steel tube, 4 m long, has walls 5 mm thick and is open at each end. if the outer diameter is 41 cm, what's the inner diameter?

47. ## U.S. government

how is the constitutional principle of federalism reflected in the formal amendment process?

48. ## Chemistry

What volume of 0.150 M Na_3PO_4 is required to precipitate all the lead(II) ions from 120.0 mL of 0.350 M Pb(NO_3)_2?

49. ## AP Physics

A car slows down from 18 m/s to rest in a distance of 91 m. What was its acceleration, assumed constant?

50. ## global finance

Search: whar would jeffs monthly morrtgage payment be if he borrowed \$80,000 for 30 years at twelve percent annual rate? pls give me the solution and answer by using formula FV=(1+r) to the power of t -1 over r

51. ## biology

In two to three well-developed paragraphs, explain how the graph below helps support the concern that burning fossil fuels has changed the atmosphere. Describe, in your own words, the change shown in the graph and how this change is occurring in the

52. ## Statistics

A computer manufacturer is about to unveil a new, faster personal computer. The new machine clearly is faster, but initial tests indicate there is more variation in the processing time. The processing time depends on the particular program being run, the

53. ## science(biology)

all test crosses are back cross but all back crosses are not test cross.i want to justify this statment.plssssssss

54. ## English - Debate writing

I have a homework on debate on the motion 'The youth should be blamed for indiscipline in the society ' .Please help of to raise points for the motion .

55. ## Spanish

once x cien = mil cien once x cien = Mil ciento which on is right??

56. ## chemistry

Calculate the pH after 0.15 mol of NaOH is added to 1.00 L of the solution that is 0.50 M HF and 1.01 M KF

57. ## Chemistry (pleas help!)

A radio wave has a wavelength of 1.0 km. What is the radio frequency? 0.30 MHz 300 KHz 3.0 MHz 30 KHz

58. ## geometry

Mr.soto drew a design for a quilting pattern. The design is made up of 5 congruent isosceles trapezoids as shown below. What is the measure, in degrees, of angle y?

Determine the points of inflection of the function. f(x) = x + sin x (−2π ≤ x ≤ 2π)

60. ## math

A candy dish contains 10 red, 10 orange, and 10 black gumdrops. A second dish contains exactly the same assortment. If you select a gumdrop from each dish, what are the chances that you will get two of the same color??

61. ## chemistry

Based on their molecular structure, how can you figure out which is stronger between two oxyacids? Our textbook is really vague. I thought it had to do with which had more oxygen but one of the question compares CH3COOH and CCl3COOH so now I'm lost again.

62. ## Chemistry

Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 70. cm3. If the combustion of this mixture releases 930. J of energy, to what volume will the gases expand against a constant pressure of 670. torr if all the

63. ## Chemistry

A 5m long fishing boat is anchored on a windy day. The skipper notices that as one wave crest is leaving the stern another is arriving at the bow. If 15 waves are counted arriving in 10s, what is the speed of the water waves?

64. ## volume

A cylindrical aquarium has a 10 foot diameter and an 18 foot height and holds 10,400 gallons of water. What is the aquariums's volume in cubic feet?

65. ## health

What would be the risk od a young healthy person choosing a managed care plan,

66. ## Physics :/

An object 3-cm high is 20 cm from a concave mirror. The focal length of the mirror is 8 cm. a. Calculate where the image is located. b. Calculate the size of the image

67. ## general chemistry

naturally occuring chlorine is composed of 35CL with atomic mass of 34.969 37CL with atomic mass of 36.966 the average atomic mass id 35.453 what are the percantages of each isotope in naturally occuring chlorine ?

68. ## Biology

in cattle a dominant gene (N) results in a deep notch in each ear. a recessive gene (n) results in an "udder" abnormiality when in the homozygous condition. a farmer desires to rid his herd of these characteristics. which of these two alleles would be

69. ## Math

can you prove this equation for me? sin2x X sec2x = 2sinx

70. ## physics

A block of mass m = 5 kg is attached to a spring (k = 28 N/m) by a rope that hangs over a pulley of mass M = 7 kg and radius R = 3 cm, as shown in the figure. Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of the pulley,

71. ## physics

A force, F = (2x + 5y) N, is applied to an object at a point whose position vector with respect to the pivot point is r = (2x + 4y + 5z) m. Calculate the torque created by the force about that pivot point.

72. ## Writing

I think I fixed everything. Technology, Technology, that's all we use to communicate today. There's Facebook, Twitter, Myspace, and so many more. Technology is very distracting and this causes many kids to fail and fall behind in school and grades. I agree

73. ## MATH

A local politician claims that 1 in 5 automobile accidents involve a teenage driver. He is advocating increasing the age at which teenagers can drive alone. Over a 2 month period, there are 67 accidents in your city, and only 9 of them involve a teenage

74. ## MATH

ken cuts a 10fo piece of wire, the first piece is three times longer then the second how long is each piece?

75. ## math

how far weill a six foot pole fall in .02 seconds

76. ## Physics

How do i get the answer A steel ball of diameter Lb = 4.196 cm is placed on a hole of diameter Lh = 4.042 cm on an aluminium plate. The initial temperature is 14 ¢XC. What would be the minimum temperature so that the ball will fit through the hole if both

77. ## economics

List the types of potential segmenting dimensions, and explain which you could try to apply first, second and third in a particular situation. If the of nature of the situation would affect your answer. Explain why

78. ## Microeconomics

Suppose that two people, Michelle and James each live alone in an isolated region. They each have the same resources available, and they grow potatoes and raise chickens. If Michelle devotes all her resources to growing potatoes, she can raise 200 pounds

79. ## A LEVEL LAW

where can we students find the best answers attempted by the highest scorers in past years on A level Law exam? can we get any clear answer structure which helps us know how to attempt an A grade answer?

80. ## Math

solve first derivative of f(x)=-460+100Q-Q2 where Q=10

81. ## statistics

you and 50 coworkers decide to play a game that consists of flipping a coin once for each coworker. If the flip coin for the particular coworker results in a head, you have to pay them \$1. If it results in tail, neither party has to pay anything. Given the

82. ## maths

Looking for some guidance please, I need to find the initial-value problem for dy/dx = 1+2cos^2x / y. y = 1 when x = 0. any help is much appricated

83. ## math

How many different four-digit number combinations are possible from the numbers 0-9?

84. ## Algebra

How do I read the equation (function) y=-0.03x^2+0.14x+1.43? Do I have to complete the square to find the vertex, max., min., etc.? This function is part of a word problem that I am trying to do. I would appreciate any help.

85. ## math

The cost C in dollars for driving a rental car x miles is C=0.2x+35. How much would it cost to rent the car but not drive it?

87. ## English

Can you please check these sentences, please? Thank you very much for your previous corrections! 1) How can I get to school? Can you tell me the way to school, please? 2) Do you know the bank in Cross Street? Is Oxford street the road near the station?

88. ## calculus

An open-topped cylindrical pot is to have volume 125 cm3. Determine the minimum possible amount of material used in making this pot? Neglect the thickness of the material as well as possible wastage. Give your answer accurate to 2 decimal places

89. ## Financial Management

XYZ International’s bonds mature in 12 years and pay 7% interest annually. If you purchase the bonds for \$1,150, what is your expected rate of return?

90. ## calculus

Determine the derivative of f(x)=x^2In(cosx)

91. ## Finance

Calculate WACC for Target Corporation and Ecolab, Inc

92. ## science

Is it possible that waves can be turned into a sourse for energy and/or power ?

93. ## Quantitative Analysis for business

Key considerations as Allied develops its strategy for disposing of the case are the probabilities associated with John’s response to an Allied counteroffer of \$400,000 and the probabilities associated with the three possible trial outcomes. John will

94. ## grade nine math Polynomials

Mr. Smart just bought a new dog named Fluffy. Mr Smart would like to enclose a play space for Fluffy in his back yard. The 5 side play space has the dimensions, in metres. They are x +11, 2x-4,3x. Write a simplified expression for the number of metres of

95. ## math

Hello i have a probability problem that i can slove, and i need some help please. problem: If a mother has three bananas, two pears and two oranges, in how many different ways can she give the fruit to her daughter in one week, one piece of fruit per day?

96. ## management

please help me to correct the word of terms 1 to synthesize or put together 2 to put together or form a whole 3 this connotes many things 4 sales of stocks corporation in the stock exchange 5 trading place ans. 1 combine 2 collect 3 do not know 4

97. ## JAVA

simple java program to retrive data from oracle database between specific dates.. Please somebody help na???

98. ## Statistics

Calculate: 8 8 7 6 8 7 6 5 P P P P C C C C 3 4 6 1 3 5 2 0

99. ## Earth Science

As a star ages, its internal composition changes as nuclear reactions in the star's core convert one element into another. True or false?

100. ## Chemistry

If sound in air with wavelength 1.7 m enters a body of water, what would its wavelength be in water?

101. ## math

How can you compare 2 fractions by using a number line?

102. ## computers

A relational database for a real-world client what would be the example ?

103. ## pre algebra

(8xto the 5th power-5x)(7xto the 3rd power)

104. ## Microecinomics

If Michelle devotes all her resources to growing potatoes, she can raise 200 pounds of potatoes per year. If she devotes all her resources to raising chickens, she can raise 50 chickens per year. (If she apportions some resources to each, then she can

105. ## math

what is the gcf of 215 and 125?

106. ## math

How do I determine how many cupcakes to bring for 28 students, using a 14 batch recipe to give each kid 3 cupcakes

107. ## English

Short story about African politician and underline the topic sentence.

108. ## financial management

Best Buy mails ‘Rewards Certificates’ to frequent buyers that have a specific dollar amount that can be used towards future purchases. If the rewards program gives back approximately 5%, evaluate the following statement: “Best Buy could have the same

109. ## math

is the realtion a function? explain (1,1), (2,1), (3,1), (4,1)

110. ## physics

What is the density of air filled balloon and the mass of 6 inch balloon air filled

111. ## math

find g(1)+g(2)+g(3)+...+g(50) given that g(x)=13-5x

112. ## English

Can you please check these sentences for me? Thank you very much. It is really urgent! 1) She was looking at the people sitting at the cafè while she was driving. 2) She was listening to music on her earphones while she was running in the park. 3) She was

113. ## science

Suppose that you can just barely see a certain star that is at a distance of 100 light years. How far away must a star that is 4 times more luminous be barely be seen/how about a star that is 100 times more luminous?

114. ## sonnet 14 line poem

identify 3 different poetic devices

115. ## English

I forgot to include the following sentences. Thank you very much for the help. I wonder if you could say "a post office in Oxford Street instead on Oxford Street" in British English. 1) I have to keep my homework exercise book in order. 2) At school I

116. ## Quantitative Analysis for business

Key considerations as Allied develops its strategy for disposing of the case are the probabilities associated with John’s response to an Allied counteroffer of \$400,000 and the probabilities associated with the three possible trial outcomes. John will

117. ## capital cost

Supplier A has old equipment that produces at the rate of 10,000 per hour. Supplier B has equipment that produces at the rate of 20,000 per hour and supplier C has new equipment that produces at 40,000 per hour. You need 60,000 pieces. Each supplier uses

118. ## math

a bag full of gum drops. 2/3 of which are blue. the red drops are 3/8 of the number of blue. There are 3 green drops. How many drops in the bag?

119. ## Algerbra

A piont on a graph that works for x-y=8and x+y=-2

120. ## physics

A particular amplifying device supplies electrons in a manner such that the current passing out of the device is given by I(t) = (Io)e^kt, where I(0) = Io = 2A.The current measured 12 seconds later is 3.4 A.Find (a)The charge Q that passes out of the

121. ## Math

find p/q if (2q^2-pq):(q^2-pq) = 2:3.

122. ## volume

A can has is 21 centimeters tall and has a diameter of 8 centimeters. What is the volume of the can?

123. ## math

A spray rig moving at 3 mph delivers 44 gallons per acre when the nozzles on the rig are 20 inches apart. a) Suppose the number of nozzles were increased so that they were only 15 inches apart. Find the new delivery rate of the rig. b) How could this

124. ## History

What did the 1968 march at the Chicago Democratic Convention prove? Was there any good that came out of this situation for all of those involved, our country and the war in Vietnam? Did Arfrican Americans and other minorities achieved anything benefical

125. ## Pre-algebra

What is the answer to negative 4 to the fourth power?

126. ## Calculus

how do you solve f(x)=1-e^(4-2x) then f(2)=

127. ## math

what is all the properties to an equilateral triangle? and to a obtuse triangle?

128. ## ENGLISH

MY DADS TURNING 40.I NEED A GREAT SPEECH ABOUT 2 MINUTES. THE CRITERIA IS THE FFG SIGNFICANCE OF DAD TURNING 40-5MARKS COMIC-10 MARKS LEGNTH-5MARKS OVERALL-30MARKS

129. ## geometry

If the length of one diagonal of a square is 4 feet, what is the length of the square's second diagonal?

130. ## internet

In FDMA different message simultaneously ocupy the different frequency band????

131. ## physics

What is the density of air filled balloon and the mass of 6 inch balloon air filled

132. ## science(biology)

i want to prepare a chart showing different blood groups and its possible genotype? pllsssss

133. ## teaching

hello. i need help starting a pre-iep outline. i have never seen one before. thank you.

134. ## geometry

how to turn volume into gallons

135. ## Chemistry

What is the energy of a 425 nm photon? a) 2.82 x 10^-40 J b) 1.6 x 10^-27 J c) 4.67 x 10^-19 J d) 4.67 x 10^-28 J I don't get any of these answers. =S Please help...

136. ## math

m=-2/3; b=45

is anyone can help me get the corect answer or idea for this question. what is industrial research?how does this area of management help the business organization in its product improvement.

138. ## Statistics

in populations that are different from others. I would like to figure a sample of 10 with a mean of 44

139. ## Chemistry

What is the energy of a 425 nm photon? a) 2.82 x 10^-40 J b) 1.6 x 10^-27 J c) 4.67 x 10^-19 J d) 4.67 x 10^-28 J I don't get any of these answers. =S Please help...

140. ## math

Write a word problem for 5 x 2 1/2 which requires the use of repeated addition model.

141. ## algebra

help solving the equation .8x+2 less than or equal 62-1

142. ## math buisness 141

what does equivalent rate in decimals mean?

143. ## math

In equation(1)2x+3y=10

144. ## scince

When Delta T is 6 Degree centrigate then how much in Liter per minute

145. ## Geography

Why are there so many abandoned railway line in some states like Minnesota?

146. ## math

how far will a six foot pole fall in .02 seconds