# Questions Asked onAugust 1, 2011

1. ## math

Find the difference: 7 7/8 - 3 1/4=?

2. ## math

Name the corresponding part if polygon WXYZ polygon PQRS. YZ =

3. ## Math

In a recent dig, a human skeleton was unearthed. It was later found that the amount of 14C in it had decayed to (1/rt8) of its original amount. If 14C has a half life of 5760 years,how old was the skeleton?

4. ## Math

In 1976 a research hospital bought half a gram of radium for cancer research. Assuming the hospital is still exists, how much of this radium will the hospital have in the year 6836 if the half-life of radium is 1620 years?

5. ## math

Name the corresponding part if polygon WXYZ polygon PQRS. QP =

7. ## science

'm'gms of carbon reacts completely with 'n'gms of oxygen to produce carbon-dioxide.The mass of oxygen required to react with 'm'gms of carbon completely and produce carbon-monoxide is

8. ## Math

a bag contains 3 red marbles, 5 blue marbles, 2 yellow marbles, and 2 lavender marbles. How many sets of 4 marbles includes at most one of the yellow marbles?

9. ## Chemistry

How many kg. of salt needed to be dissolve in 3 liters of water to prepare 80 percent salt solution?

10. ## HUM/111

One of the key controversies in psychology is nature versus nurture. Is this a problem or an issue?

11. ## algebra

Solve by substitution method 3x+8y=17 2x+y=14 please show step by step so i can understand better. I keep getting it wrong at the end.

12. ## geometry

Given two spheres, if the volume of the first sphere is 36r, and the volume of the second sphere is 288r, what is the relation of the second radius to the first radius?

13. ## Algebra

translate to an algabric expression; one more than foru times a number

14. ## comm215

I have to write a 300-400 words essay on the following questions: Why overcrowding of school are causing teacher's to lose their jobs? -how is teacher layoffs the result of overcrowding? Please help.

15. ## math

How do you simplify 4w(9)? would it be 36w?

16. ## Physics-Need Help fast!

Two converging lenses, each of focal length 15.1 cm, are placed 40.2 cm apart, and an object is placed 30.0 cm in front of the first lens. Where is the final image formed? The image is located... What is the magnification of the system? M =

17. ## Physical Science

why does the maximum initial reaction rate cannot be reached at low substrate concentrations.

18. ## annuaties

Sally contributed \$500 every six months for fourteen years into an RRSP earning interest at 7.5% compounded semi-annually. Seven years after the last contribution Sally converted the RRSP into an RRIF which is to pay her equal quarterly payments for

19. ## algebra

f(x)=3x^2-18x-6 identify the function`s domain and range.

20. ## Chemistry

A student actually used 0.847g sample of impure KHP and the endpoint was reached after 19.82 ml of sodium hydroxide solution was added, What is the percent KHP in the unknown to four significant figures.

Could you please help me re word my paragrah? It needs to be at least 100 words. Media convergence is the merging of mass communications outlets such as television, radio and the Internet along with portable and interactive technologies though various

22. ## finance

You purchase a stock at a price of \$73, and a year later the price increases to \$85. You also received a dividend of \$2.50. Calculate the rate of return.

23. ## physics

The door and the seals on an aircraft are subject to a tremendous amount of force during flight. At an altitude of 10,000 m (about 33,000 ft), the air pressure outside the airplane is only 2.7 x 104 N/m2, while the inside is still at normal atmospheric

24. ## human resource

CheckPoint: International Staffing Resource pp.646-654 in Managing Human Resources Consider the cultural differences inherent in global business as well as the geographic obstacles of home office and remote locations being in different countries. Summarize

25. ## PHYSICS

The door and the seals on an aircraft are subject to a tremendous amount of force during flight. At an altitude of 10,000 m (about 33,000 ft), the air pressure outside the airplane is only 2.7 x 104 N/m2, while the inside is still at normal atmospheric

26. ## Math

Given the bar graph below, create a grouped frequency distribution: Hours per week: 0 1 2 3 Mike 4 5 Don 6 Daniel 7 Jake, Greg 8 Asad 9 Sandra 10 Drake 11 12 Andrea 13 This is what i got, please tell me if i did this correctly :) Hours per week # of

27. ## algebra

if 45ft=9ohms the 75ft= how many ohms

28. ## physics

A 2.0-kg wooden block slides down an inclined plane 1.0 m high and 3.0 m long. The block starts from rest at the top of the plane. The coefficient of kinetic friction between the block and plane is 0.35. What is the speed of the block when it reaches the

29. ## COM/155 UNIVERSITY COMPOSITION AND COMMUNICATION I

Write six original sentences in which pronouns are used in a consistent manner. What strategies might a writer use to ensure pronouns are used effectively?

30. ## management information system

hi theres a bunch of wrong answers in my quiz earlier and i want to know the correct answer, so please help, and this not not my homework..thanks 1.amount of time and attention required is a typical___measure of product performance a. cost b.quality(my

31. ## algebra

Break even analysis Initiual fee cost \$200.00 and \$50.00 dollars for labor.the other company charges \$300.00 initiual fee and \$25.00 per hour for labor

32. ## math

The Derr-McGee Manufacturing Company plans to build a new \$50,000 warehouse seven years from now. They plan to accumulate the \$50,000 in an account before beginning construction. If money is worth 7% compounded annually, how much must each year?s deposit

33. ## music

how does music and culture influence each other

34. ## science

If the aim is to let a 700 kg pump flout on the surface of water, how many cylinders ( 50cm*90cm ) containing fresh water should we have ?

35. ## chemistry

Gibbs free energy What is the equilibrium constant at 25 C? deltaG= deltaH - (T(K)+deltaS) deltaS= -121.1 deltaH= -77.36 so at 25 C deltaG = -77.36 - (298*(-121.1)) deltaG ~ 3.6*(10^4) so my question is: what *is* the equilibrium constant, or perhaps more

36. ## maths methods

Find the angle of depression from top of a 500 m long chairlift with a vertical height of100 m

Could you please help me re write the sentences below. Media convergence is the merging of mass communications outlets such as television, radio and the Internet along with portable and interactive technologies though various digital presentation

38. ## Math

Bryan and Kim are painting a house. Working together they can paint a house in three-fifths the time it takes Kim to paint the house working alone. Bryan takes 15 hours to paint the house alone. How long does it take Kim to paint the house working alone?

39. ## accounting

Horton Company, as lessee, enters into a lease agreement on July 1, 2008, for equipment. The following data are relevant to the lease agreement:

40. ## accouting

Horton Company, as lessee, enters into a lease agreement on July 1, 2008, for equipment. The following data are relevant to the lease agreement: 1. The term of the non-cancelable lease is 4 years, with no renewal option. Payments of 422,689 are due on June

41. ## math

perform the indicated operation (9x10^6)x (6x10^4)

42. ## chemistry

if k>>1 ? Choose the correct answer 1) the equilibrium mix. Will favour product over reactants 2) the equilibrium mix. Will favour reactants over products 3) the equilibrium amounts of reactants and products are equal 4) the reaction is irreversible

43. ## algebra

the body mass index ,I,can be used to determine an individuals risk for heart disease. An index less then 25 indicates a low risk. The body mass index is given by the formula,or model,I=700w/h2, where w = weight,in pounds,and H=height,in inches.Jerome is

44. ## Grammar

Unable to find her driver's license, Mary asked the agent whether a credit card would be sufficient enough evidence to prove her identity. Here, "sufficient enought" is the error. But I do not know why that is. Please explain in details! Thank you.

45. ## Botany - Science

What plant species has leaves growing in their internodes?

46. ## calculus

determine whether 9x-y+16 equals 13 49 y as a function of x

47. ## physics, forces and weights

If the aim is to let a 700 kg pump float on the surface of water, how many cylinders ( 50cm*90cm ) containing fresh water should we have ?

48. ## calculus

A team has been working to convert diesel-powered cars to run just as efficiently on used cooking oil! They want to compare the mileage and speed of their prototype with that of the diesel-powered car. The prototype is 100 meters south of an intersection,

49. ## math

if june is the starting month what month would it be 77 months from june?

50. ## Geometry

Use any tools to construct each of the following, if possible: a. A right triangle with one acute angle measuring 75° and a leg of 5 cm on a side of the 75° angle b. A triangle with angles measuring 30°, 60°, and 90°

51. ## calculus

Use multiplication of power series to find the first three non-zero terms of the Maclaurin series of e^x ln(1 − x).

52. ## psychology of health promotion

assingments/term paper on psyhological basis of health promotion

53. ## history

the main goal of the habsburg empire in wwI was?

54. ## math

saturday is the starting date what day will it be 1 year 44 day from saturday no leap years

55. ## math

Give your own example of at least four ordered pairs that does not model a function. The domain will be any four integers between 0 and +10. The range will be any four integers between -12 and +5.

56. ## geometry

how would you solve for x in a 45-45-90 triangle if the hypotenuse is 9 square root 2

57. ## Physics

a car travels at 20km/h for 1.5h, at 30km/h for 2.0h, and at 40kmh for 0.75 h. What is the car average velocity

58. ## math

define the word “function.”

59. ## chemistry

Calculate the equilibrium constant at 25 C for CH4 + 2 H2O --> CO2 + 4H2 given: delta G for CH4 = -50.81 H2O = -228.6 CO2 = -394.4 H2 = 0

60. ## intermediate algebra

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions,state this. 3x+7y=77 -2x+7y=42

61. ## Life orientation

5 ways in which the human or environmental problem impacts on the community

62. ## intermediate algebra

use thr discriminant to determine wheather the following equations have solutions that are two different rational solutions;two different irrational solutions; or two imaginary solutions.8x^2+7x+3=0

64. ## careers in early childhood education

Factors that support the need for a more family-centered approach to education include an increase in the divorce rates and the: a.)increasing numbers of immigrant families. b.)need for children to respect their elders. c.)federal legislation that forces

Using polynomial long division to divide. 25x^3+40x^2-25x+10 by -5x^2-3x-2

66. ## algebra

multiply. 3x+3 by -4x^2+4x-2

67. ## algebra

Express in terms p. 2 square root of -36

68. ## statistics

3. A researcher is interested in comparing the Christian maturity level of students who volunteer for community service versus those who do not. The researcher assumes that those who perform community service will have higher Christian maturity scores. The

69. ## algebra

Solve by the elimination method. x+4y=45 -x+4y=27 please step by step

70. ## IGCSE(Maths)

a)The number 19 to the power 100(sexdecillion) is called a 'Googol'!If it takes 1/5 secod to write a zero and 1/10 second to write a 'one', how long would it take to write the number 100 'Googols' in full b)The number 10 to the power of a 'Googol'is called

In which of the following situation would it be BEST to recast the situation as a positive message? A.When you want to maintain goodwill with the reader, because you still have to deal with each other. B. When there really is not a reason for the refusal.

72. ## Calculus

A team has been working to convert diesel-powered cars to run just as efficiently on used cooking oil! They want to compare the mileage and speed of their prototype with that of the diesel-powered car. The prototype is 100 meters south of an intersection,

73. ## math

Coach Johnson is 10 years older than Tim. When Tim started football 3 years ago, Coach Johnson was twice his age. How old is Tim now? Numerical Answers Expected!

74. ## math

Matt is a short put champion and is planning to participate in the next Olympic Games. He starts to practice and completes 49 throws from a center point in different directions. When he started to measure all the distances, he found that every throw landed

75. ## careers in early childhood education

Examples of best practices of caregivers, culled from different childcare experiences, include all of the following Except: a.)exude an energetic affection for the children. b.)tell parents judgmental stories about their children. c.)problem-solve with

76. ## math

Write a paragraph explaining how to find the surface area of a cone with height 10 in. and base radius 8 in

77. ## Calculus

8-3i divided by -4-6i=

78. ## world history

what were the main similarities and differences between Greek and Roman political structures?

79. ## chemistry

how to calculate neutrons in 99Tc43

80. ## Science

If it takes 35s for the tughboat to increse its speed uniformly to 25 km/h, starting from rest. The barge has a mass of 75Mg. The propeller provides the propulsion force F which gives the tughboat foward motion, where as the barge moves freely. Determine

81. ## English

I need to check my work on diagramming this question. How many players are on a team? I think it should be as follows: How (adverb) many (adjective) players (direct object) are (past tense verb) on (proposition) a (definite article) team (subject of

82. ## life orientation

2 institutions that redress teenage pregnancy

83. ## Chemisty

In terms of saturation, how would you classify a KBr solution with a concentration of 78 g/100 g of water at 47°C?

84. ## comm215

-Why overcrowding of school are causing teacher's to lose their jobs? -how is teacher layoffs the result of overcrowding?

85. ## Chemisty

In terms of saturation, how would you classify a KBr solution with a concentration of 78 g/100 g of water at 47°C?

86. ## Chemisty

How much KNO3 will you have to add to 100 g of water at 40° C to make a saturated solution?

87. ## Chemisty

How would you classify a solution of NaCl at 35.9 g/100 g of water at 20° C?

88. ## physics

A car moving at 35 mi/h is stopped by jamming on the brakes and locking the wheels. The car skids 53 ft before coming to rest. How far would the car skid if it were initially moving at 56 mi/h?

89. ## life orientation

what you are talking about if you are talking about alcohol abuse

90. ## MATH

The frequency distribution indicates the heights of 45 male high school seniors. Height(in.) Number of Males 64 2 65 6 66 7 67 9 68 10 69 6 70 3 71 0 72 2 a) Construct a histogram of the frequency distribution. b) Construct a frequency polygon of the

91. ## Math

How long will it take for a 1 g sample of Polonium 210 to lose all but 1/28 of its radioactivity if the half-life is 140 d?

92. ## Calculus

If \$22,550 is invested at 2.95% compounded continuously, how long will it take to reach \$50,000 in the account?

93. ## math

please let me know the probability that in five tossess, a coin shows heads at least 3 times in succession?

94. ## english

the boy was penitent and - to the store clerk for stealing the candy

95. ## comm215

please help me correct my essay. the topic of the essay is:"Why overcrowding of school are causing teacher's to lose their jobs overcrowding? and how teacher layoffs are the result of overcrowding." below is a copy of the essay i wrote... One main concern

96. ## geometry

what is the formula for the circumference of a whole circle with two semicircles

97. ## Math

Given the bar graph below, create a grouped frequency distribution: Hours per week: 0 1 2 3 Mike 4 5 Don 6 Daniel 7 Jake, Greg 8 Asad 9 Sandra 10 Drake 11 12 Andrea 13 This is what i got, please tell me if i did this correctly :) Hours per week # of

98. ## physics

Martin caught a fish and wanted to know how much it weighed, but he didn't have a scale. He did, however, have a stopwatch, a spring, and a 5.50 N weight. He attached the weight to the spring and found that the spring would oscillate 20 times in 64 s. Next

99. ## ALGEBRA

(5y2-4y)+ (2Y2+6Y-9)

100. ## algebra

Explain how many miles does it takes to get from home to work, with "distance Formulas?'

101. ## Algebra

I am having trouble with two problems. I can't seem to get a solid solution to either one of them. 3/y+5 + 6/7y add and simplify 5-r/8-r = 3/r-8 solve Can someone help me please? Thanks so much.

102. ## Algebra

I have to work out this equation for my college paper and I am having trouble understanding graphs, etc. The question is C=200+50 and C=300+25. Can anyone walk me through the steps on how to graph this?

103. ## math

1 kilometer =

104. ## phy132

a taut rope has a mass of 0.180kg and a lemgth of 3.6m.what power must be supplied to the rope to generate sinusoidal waves having an amplitude of 0.1m and a wave length of 0.5m and traveling with a speed of 30mper second

105. ## calculus

Recall that a function G(x) has the limit L as x tends to infinity, written lim(x->infinity)G(x) = L, if for any epsilon > 0, there exists M >0 so that if x > M, then |G(x) − L| < epsilon. This means that the limit of G(x) as x tends to infinity does not

106. ## calculus

Use division of power series to find the first three terms of the Maclaurin series for y = sec x.

107. ## Math

Okay, I need to find the 101th term of the sequence 5,9,13,17,21... Do I do this: a1 + (n-1)d SO... 5+(101-1)4 5+(100)4 105x4 420 Did I do this problem correctly?

108. ## Math

How long will it take for a 1 g sample of Polonium 210 to lose all but 1/28 of its radioactivity if the half-life is 140 d?

109. ## Math

Bacteria experiences exponential growth, increasing 17% every hour. If there are 800 bacteria now, in how many hours will there be 2000? How would I go about this problem?

110. ## math

if f(x)= 5x+7 and g(x)=x^2-2 write the functions a. (fxg)(x) b. f(g(x))

111. ## math

find the center and radius of a circle given the equation in general form x^2+y^2+4x-6y+2=0. center: ? radius: ?

112. ## Algebra

solve 5y+3y is less then or equal to-72

113. ## Calculus

put in standard form: 4x^2=36+9y^2

114. ## statistics

I am not understanding this last portion of my statistics class. I am completely confused about critical values. Please help me. Thank you!! What critical value for z would be used to test the hypotheses: H_0:μ≥15 and H_a:μ

115. ## Algebra

4(r-6)+1>5(r+3)-25 the solution set is ?

116. ## Algebra

9/10( 7+2x) +2 is greater then or equal to 14

117. ## HUM

COuld you please help me re word this sentence- Social media sites have affected commerce because people can advertise to thousands of people all at once through different sites.

118. ## HUM

Could you please help me re word this paragraph. I need it to be at least 100 words, but this one that I did was not good enough. Social media sites have affected commerce because people can advertise to thousands of people all at once through different

119. ## science

Describe the relationship between substrate concentration and the initial reaction rate of an enzyme-catalyzed reaction. Is this a linear relationship? What happens to the initial reaction rate as substrate concentration increases?

I need help with my economics with calculating the NPV of the cash flows expected in 2006-2010 using only the 2005 Cost of Capital (don’t worry about increasing costs of capital). Calculate the NPV of the cash flows using the CASH FLOW figures at the

121. ## HUM

I did not understand this part of my class so here is the question What is media convergence? Provide an example of media convergence and explain the media elements that are being combined. Explain how the combination of media elements in your example may

122. ## physics

Toolkit Block A slides down a ramp whose slope is 45°. An identical block B slides down a ramp whose slope is 60°. Both blocks start at a height of 2 meters. Compare the kinetic energies (KE) of the blocks just before they reach the bottom, assuming

123. ## annuaties

Mr. Strupp expects to retire in 12 years. Beginning one month after his retirement, he would like to receive \$500 per month for twenty years. How much must he deposit into a fund today to be able to do so if the rate of interest on the deposit is 12%