# Questions Asked onSeptember 3, 2011

1. ## Physical Science

Two tugboats are towing a ship. each exerts a horizontal force of 5 tons and the angle between their tow ropes is 90. what net force is exerted on the ship?

2. ## Math OPTIMIZATION

A plastics firm has received an order from the city recreation department to manufacture 9,000 special Styrofoam kickboards for its summer swimming program. The firm owns 10 machines, each of which can produce 30 kickboards an hour. The cost of setting up

3. ## math

A movie theater seats 500 people. For any particular show, the amount of money the theater makes is a function m(n) of the number of people, n, in attendance. If a ticket costs 2 dollars, find the domain and range of this function. domain: ?≤ n ≤?

4. ## Chemistry

Suppose you have two 100- graduated cylinders. In each cylinder there is 44.0 of water. You also have two cubes: One is lead, and the other is aluminum. Each cube measures 1.5 on each side. After you carefully lower each cube into the water of its own

5. ## Science

Two tugboats are towing a ship. Each exerts a horizontal force of 5 tons and the angle between their towropes is 90°. What net force is exerted on the ship?

6. ## Chemistry

How many cubic centimeters of olive oil have the same mass as 1.60 L of gasoline? Density of gasoline: .66 g/ml Density of olive oil: .92 g/ml

7. ## Algebra

22-5c+8;3 what's the procedure of doing this?

8. ## chem

The label on a 1-pint bottle of mineral water lists the following components. If the density is the same as pure water and you drink 5 bottles of water in one day, how many milligrams of each component will you obtain? fluoride 0.08 ppm ppm=mg/kg I just

9. ## PreCal

Write the polar equation in rectangular form r=-12 sinè

10. ## PHYSICS

A square wire loop 10.0 cm on each side carries a clockwise current of 15.0 A. Find the magnitude and direction of the magnetic field B at its center due to the four 1.20 mm wire segments at the midpoint of each side?

11. ## bus/stats

a sample of the personal files of eight male employees revealed that, during a six-month period, they lost the following number of days due to illness: 2,0,6,3,10,4,1 and 2. Calculate the standard deviation of the above sample? the means deviation is

12. ## calculus

Factor and solve for x 1) x^4 - 9x^2> 0 2) 4x2^x - x^3 2^x

13. ## algebra/math

Find the amount of interest and the monthly payment for the loan. Purchase a car for \$42,700 at 2.5% add-on rate for 5 years. (Round your answers to the nearest cent.) \$ interest \$ per month

14. ## calculus

Find the points of intersection of the curves y=2sin(x-3) and y=-4x^2 + 2

15. ## math

I am taking a job related test consisting of several math sections. I have been out of school for quite some time and am looking to find the easiest place to get tips and tutorials to solve these questions. The topics are as follows: multiplication and

16. ## PreCal

A surveyor records the polar coordinates of the location of a landmark as (40, 62°). What are the rectangular coordinates? Round each coordinate to the nearest hundredth.

17. ## PHYSISC

Two parallel, straight wires that are very long are separated by a distance of 0.065 m and carry currents of I1 =15 A and I2 =7.0A. Find the magnitude and direction of the force that the magnetic field of wire 1 applies to a 1.5-m section of wire 2 when

18. ## physics

displacement for walking 100m east than 125m west

19. ## trig

If sin T = 1/2, then the value of sinT ( sinT - cosecT ) is

20. ## Chemistry

You have two beakers, one filled to the 100-mL mark with sugar (the sugar has a mass of 180.0 g) and the other filled to the 100-mL mark with water (the water has a mass of 100.0 g). You pour all the sugar and all the water together in a bigger beaker

21. ## English

Hi I have an assignment in English. I am suppose to write a paragraph. "You've applied for a specific job in your field of study. The Human Resources Department arranges an interview and tells you to bring with you a polished piece of writing for them to

22. ## survey of mathematics

in a survey of 24 college student,it was found that 16 were taking and english class,17 were taking math class,and 10 were takin both english nad math.how many student were taking a math class only.

23. ## Physical Science

The brakes of a care are applied to give it an acceleration of -3m/s^2. The car comes to a stop in 5 s. What was its speed when the brakes were applied?

24. ## chemistry

so this problem tells me to find the thickness of one atomic layer of gold using the volume occupied by one gold atom (1.73*10^-23) which i found from the previous problem idk but is thickness the same as volume? from the previous question it also gives me

25. ## math

how do i do practice A

26. ## Simple math question!

h(0.5) if h(x) = 6-2x^3 So I set it up as 6 - 2(0.5^3) correct? That way only the (0.5) is being cubed, and THEN multiplied by 2? Or does it mean to cube the entire product? Such as (2 x 0.5)^3? Ugh simple things like this always get me! I can solve it

27. ## trig

Write the expression and evaluate. There should only be one answer which should match the range of the inverse trig function. Sec^-1(-2) sec^-1(-sqrt2) Cos^-1((-sqrt3)/2) Tan^-1(-sqrt3) Could someone explain how to get the answer as well please.

28. ## chemistry

This has to do with law of conservation of mass I believe but it stumps me. 50g or iron reacts with 21g of oxygen to form how many gram of iron oxide? Is the answer 71g or 29g

29. ## Chemistry

Thank you very much for your assistance preemptively. My question has to do with law of conservation of mass. A 50g sample of iron reacts with 21g of oxygen to from how many grams of iron oxide? Is the answer maybe 71g or 29g. This is stumping me.

30. ## trig

Write the expression and evaluate. There is only one answer whIch should match the range of the inverse trig function. Sec^-1(-2) Sec^-1(-sqrt2) Tan^-1(-sqrt3) Tan^-1(sqrt3)

31. ## Biochemistry

Which of the following peptide fragments would you expect to find buried in the center of a water soluble protein? Explain your answer. a) DEGKRGDK b) ALVWIFLF

32. ## londontowne

divide the product of 8 and 1/2 by .02

33. ## math 30 pure

determine the zeros(to the nearest tenth) and the domain and range: y=-2x+4 and y=-x2(squared) - 3x - 4

34. ## Another simple math problem (y=mx+b)

Write an equation in slope-intercept form for each line described. (I just need my work checked, thank you!) The slope = 1/2, and the line passes through the point (3, -1) First I used point slope formula y-ysub1 = m(x-xsub1) y+1=1/2(x-3) then, went on to

35. ## Psychology

When a boxer is knocked out, it is believed that his _____ has been affected.

36. ## Science

Rip Van Winkle was a man who slept 20 years Upon autopsy, it was found that there was structual damage to his?

37. ## Science

When a boxer has been knocked out what part of his brain has been affected?

38. ## chemistry

If you have 12 moles of a substance, how many molecules do you have of that substance? Suppose the substance has a molecular weight of 342. How many grams of that substance would you have to dissolve in a liter of water to make a 12 M solution?

39. ## economics

How do minimum wages affect equilibrium price?

40. ## economics

For example the productive needs of the firm would be to set (Marginal Revenue = Marginal Costs (MR = MC) and create excess profits for the firm. However, as far as what is in the best interests of society it might be Price or (Average Revenue) = MC. Give

41. ## Mathematics optimization

The arithmetic mean of two numbers a and b is the number(a+b)/2. Find the value of c in the conclusion of the mean-value theorem for f(x)=x^2 on any interval [a,b].

42. ## algebra

how would you solve: Find the sum of the first 12 terms to the earest hundreth 6 + 2 + 2/3 +...

43. ## algebra

Factor: A.) 2x^2-9x-18 B.) 14x^2-55x-36 C.) x^3+3x^2-x-3

44. ## chemistry

a 100.00 mL sample of water has an initial temperature of 20.0 degrees C. The water is heated, and after 5 minutes its temperature is 50 degrees C. approximately how much energy was absorbed by the water? (the specific heat of wter is 4.18 J/g. degrees C

45. ## Math

math sequence probelm

46. ## algebra

simplify and show all work 11+12^2-(-11)*12 is this right11+144-(-11)*12 155-(-11)*12 144*12 1,928 simplify -(8m)-(-7m+2) 15m-2 according to order of operation what should be done first when evaluating this expression do not solve [10-(-2+1)]-9

47. ## Microeconomics

Suppose you are a painter, and the price of a gallon of paint increases from \$3.00 a gallon to \$3.50 a gallon Your usage of paint drops from 35 gallon a month to 20 gallons a month. Perform the following Compute the price elasticity of demand for paint and

48. ## Math/Nutrition

I need to figure out percentages of total calories that come from carbohydrates. I do not know the formula for this. There are 29 grams of carbohydrates and 116 calories from carbohydrates.

49. ## math/algebra

solve x^2 + x - 12 = 0 quadratic formula??

50. ## chemistry

The density of brass is 8,600 kg/m3 or 8.6 g/mL. You have 2 kg of brass. What is the volume?

51. ## algebra

simplify -4^6

52. ## algebra/math

Find the amount of compound interest earned in an account that opens with \$24,000, earns 3.5% interest compounded daily, and is held for 10 years. Assume 360 days in a year. (Round your answer to the nearest cent.) \$

53. ## physics

A car starts from rest and accelerates for 2.8 s with an acceleration of 2.1 m/s2. How far does it travel? Answer in units of m

54. ## Chemistry

A car travels at 60 miles per hour and gets 15 kilometers per liter of gasoline. How many gallons of gasoline are needed for a 2.2-hour trip? I'm confused on how to set-up conversion factors.

55. ## statistics

the addition of 11 numbers is 66.from them the avarage of 5 numbers is 3.and the avarage of last 5 numbers is 9. what is the 6th numbers?

56. ## geometry

Triangle ABC is congruent to triangle DEF. If the length of AB is 12 feet and the length of AC is 10 feet. Find the length of DE. can someone please help me on this question please and thank youu :)

57. ## math solution

david has fixed 1200000.the yearly fixed deposite rate is 7.5%.how much money will he get with the interest after 5 years?

58. ## science

I need a hypothesis that I did not use already to determine which bees will fly further-the older ones or the younger ones.any ideas?

59. ## Calculus

Can someone please tell me how to find the following integral? cos^4(2q)*sin(2q) dq

60. ## Public Health

I am writing an essay on OSHA in construction industry and I am to include staffing mix & predictive factors on the Law. Am I right to say staffing mix is how many number of workers are staffed. Predictive factors - falls are common protective gear

61. ## algebra

want to know if this right simplify and show all work -3x^2+4xy+7y^2+2(-3x^2+5xy+11y^2) -3x^2+4xy+7y^2-6y^2+10xy+22y^2 -3x^2+14xy+45y^2 and -6a-4a-2(100^2+3a) -6a-4a^2+200+3a 3a-4a^2+200

62. ## ALgebra

distance and time. A car is traveling 60 miles per hour, . Give the time take the car to travel 360 M miles.by using a rational expression

63. ## Calculus

I have an integration problem. INT(t+8)^2/t^4 dt

64. ## Precalculus

Write the rectangular equation (x+7)^+y^=49 in polar form.

65. ## physics

A person is to run a circular track with a radius of 93 meters. The person starts at a certain spot and runs 3 and 1/2 times around the track in a time of 227 seconds. Find the magnitude of average velocity for this trip (|vav|) and find the average speed

66. ## statistics

david electronics had a profit of \$10 million in 2002. Profit doubled from 2002 to 2003 and profit increased eight fold from 2003 to 2004. what was the annual geometric mean rate of growth from 2002 to 2004?

67. ## algebra

About one fifth of the adult population in the United States smoked in 2005. Within the part of the population that smoked, sixth of twenty five of them were aged 25 to 44. What fraction of the adult population in the United States was aged 25 to 44 and

68. ## Biology

These are true and false questions and I want to be sure of my answers. Please someone check. Thanks: The eight-element periodicity found in the Periodic Table is related to the number of electrons in the outermost energy level of the atoms that make up

69. ## science

Does all object fall at the same speed given the mass

70. ## Math OPTIMIZATION

A home gardener plans to enclose two rectangular gardens with fencing. The dimensions of the garden: x by 12-x, y by 12-x-y a. Find the values of x and y that maximize the total area enclosed. b. What is the maximum total area enclosed? c. How many meters

71. ## math

The displacement (in centimeters) of a particle moving back and forth along a straight line is given by the equation of motion s = 4 sin ¦Ðt + 3 cos ¦Ðt, where t is measured in seconds. (a)Find the average velocity during each time period. (i) [1, 2]

72. ## bus. /stats

Use the data given in the table to construct a frequency distribution and ogive? Before constructing a dam on a Hill river, the Army corps of engineers performed a series of tests to measure the water flow past the proposed location of the dam. The results

73. ## PHYSIC

What current is required in the winding of a long solenoid that has 1000 turns uniformly distributed over a length of 0.4 m, to produce at the center of the solenoid a magnetic field of magnitude 1.0 x 10 -4 T?

74. ## PHYSIC

What current is required in the winding of a long solenoid that has 1000 turns uniformly distributed over a length of 0.4 m, to produce at the center of the solenoid a magnetic field of magnitude 1.0 x 10 -4 T?

75. ## physics

A wire carrying a 28.0 A current bends through a right angle. Consider 2.00 mm segments of wire, each 3.00 cm from the bend (see fig). Find magnitude and direction of the magnetic field these two segments produce at point P, which is midway between them.

76. ## PHYSICS

A square wire loop 10.0 cm on each side carries a clockwise current of 15.0 A. Find the magnitude and direction of the magnetic field B at its center due to the four 1.20 mm wire segments at the midpoint of each side?

77. ## physics

When one end of a bar magnet is placed near a tv screen, the picture becomes distorted. Why?

78. ## maths

tan50+tan60+sec45+cos45

79. ## math

i am taking a job related test with many math sections. I am long out of school and need some tutorials as well as practice questions and answers. The topics are as follows: -multiplication and division of fractions and mixed numbers -calculating

80. ## History

Is History an art or a science?

81. ## English

1. Buy one, get one free. 2. If you buy one, you will get one free. 3. If you buy one, you get one free. (Does #1 mean #2 or #3?)

82. ## English

Could you check these sentences on Oscar Wilde's "The Picture..", please? Thank you. 1) In the first chapter Lord Henry was relaxing on a divan smoking. Basil Hallward sat looking at his work smiling. 2) Lord Henry said that the portrait should be

83. ## English

I left out the following sentences. Thank you very much. 1) Dorian, however, is at best charming but at times enjoys hurting the artist. The adoration that Basil feels for Dorian is a disturbing mixture of terror and sorrow. 2) He was aware of gaining

84. ## science

a rail road train accelerates at a rate of 2 meters per second squared. How fast is the train moving after 6 seconds?

85. ## MATHS

Four points lie in a plane. They are partitioned into two pairs so that the sum of the lengths of the segments joining the points of each pair has the minimal possible value. Prove that these segments have no common points.

86. ## math

If the perimeter of a parallelogram is 140 m, the distance between a pair of opposite sides is 7 meters and its area is 210 sq m, find the length of two adjacent sides of the parallelogram.

87. ## Algebra 2

Could you explain the difference between the solution(s)to an equation and the solutions to an inequality.

88. ## maths

what is the value of 1000 power of 1000

89. ## physics

A car starts from rest and accelerates uniformly along a straight horizontal road at 3 metres second squeared for 4 seconds,after which it continues with a constant velocity for a further 6 seconds.CALCULATE THE MAGNITUDE OF THE MAXIMUM VELOCITY OF THE

91. ## Physics

Two point charges, +3.09 µC and -5.65 µC, are separated by 1.19 m. What is the electric potential midway between them

92. ## physics

an unknown force pushes an automobile of mass 1700kg. The automobile is ground level and accelerates at a rate of 3 meters per second squared.what is the magnitude of the force?

93. ## Algebra 2

Need help PLEASE!! Question is: There is no Closure Property of Division that applies to Integers. For example 2 divided by 3 is not an interger. What is another example of real numbers that does not have a Closure Property for one of the basic operations?

94. ## Physical Science

A car starts from rest and accelerates uniformly along a straight horizontal road at 3 metres second squeared for 4 seconds,after which it continues with a constant velocity for a further 6 seconds.What is the magnitude of the maximum velocity of the

95. ## com155

Dinner is good. Dinner was better yesterday. This is the best dinner yet. I am having a bad day. My day cannot get any worse. This is the worst day ever. The target is far away. The target should be moved further back. Whoever hits the furthest target,

96. ## Math

Jon, Fred, Ted used the number they rolled on a cube to create a number. Jon created the number 214,312. Fred created the number 232,442. Ted's number was greater than Jon but less than Fred. What is Ted's number?

97. ## COMP 100

You have been hired as a consultant by your neighbor to help her with her computer. You notice that she has a screen full of icons which appear to be Word documents, Excel Spreadsheets and other graphic files. How would you help her organize her data i.e.

98. ## physical science

A car starts from rest and accelerates uniformly along a straight horizontal road at 3 metres second squeared for 4 seconds.CALCULATE THE MAGNITUDE OF THE MAXIMUM VELOCITY OF THE CAR,I.E THE VELOCITY OF THE CAR AFTER ACCELERATING FOR 4 SECONDS.PLEASE SHOW

99. ## ENGL

List a few different genres in which you write (such as academic papers, text for social networks, business documents, diary entries, or poetry), select one, describe the specific kind of document you typically produce, and then discuss your process for

100. ## math

I need help multiply these 3 factors. (x+3)(x-3)(x-2)

101. ## physics

A plane is flying horizontally with speed 244 m/s at a height 5670 m above the ground, when a package is thrown downward from the plane with a vertical speed v(initial) = 73 m/s. What horizontal distance is traveled by this package? The acceleration of

102. ## geography

What country has the largest land area in the Western Hemisphere? My answer is Canada. Is this correct?

103. ## health

You have been hired as an administrator in an ambulatory care setting. What factors would you expect to encounter and how would you deal with them?

104. ## geography

Through which four South American countries does 20 degrees S line of latitude pass? My answer is Chile, Bolivia, Paraguay, and Brazil. Is this correct?

105. ## geography

I have one more that I want to make sure is correct! On what continent is the Chang Jiang found? My answer is Asia. Is this correct?

106. ## physic

A football is kicked stright up into the air it hits the ground in 4.6 sec later, what was the greatest height reached?

107. ## physics

The figure below shows a general situation in which a stream of people attempt to escape through an exit door that turns out to be locked. The people move toward the door at speed v = 4.1 m/s, are each d = 0.30 m in depth, and are separated by L = 1.75 m.