# Questions Asked onMay 9, 2014

1. ## Help?

1. Which of the following are Boolean operators? and, or, not *** to, for, from a, an, the is, are, not 2. How are Boolean search strategies and other search filters useful? They organize results alphabetically. *** They narrow the search results. They

2. ## Economics (45)

The 2003 Statistical Abstract of the United States reported the percentage of people 18 years of age and older who smoke. Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of

3. ## Economics (40)

A market research firm conducts telephone surveys with a 42% historical response rate. What is the probability that in a new sample of 400 telephone numbers, at least 150 individuals will cooperate and respond to the questions? In other words, what is the

4. ## Economics (39)

Suppose a random sample of size 40 is selected from a population with = 9. Find the value of the standard error of the mean in each of the following cases (use the finite population correction factor if appropriate). a. The population size is infinite (to

5. ## Economics (37)

According to the Sleep Foundation, the average night's sleep is 6.8 hours (Fortune, March 20, 2006). Assume the standard deviation is .7 hours and that the probability distribution is normal. a. What is the probability that a randomly selected person

6. ## English

Which does the following sentence contain? Walking by the river is our favorite pastime. participle infinitive as subject gerund as subject prepositional phrase as adjective I'm confused with whether it is a participle (a verb acting as an adjective) or a

7. ## Physics

A ski tow operates on a slope of angle 14.9∘ of length 320m . The rope moves at a speed of 12.5km/h and provides power for 55 riders at one time, with an average mass per rider of 68.0kg .Estimate the power required to operate the tow.

8. ## math

Marley drives to work every day and passes two independently operated traffic lights. The probability that both lights are red is 0.35. The probability that the first light is red is 0.48. What is the probability that the second light is red, given that

9. ## Science

The columbia icefield is located between banff and jasper in Alberta. It covers an area of more than 300 km squared and has ice that is up to 365 m thick in some places. How can studying this icefield give scientist information on climate patterns Please

10. ## math

ABCD is a rectangle. If AC = 2(5a + 1) and BD = 2(a + 1), find the length of each diagonal.

11. ## Electricity

50.0pJ of energy is stored in a 3.00cm × 3.00cm × 3.00cm region of uniform electric field. What is the strength of the field?

12. ## brilient stars

the temperature at 12 noon was 15 degree C above zero. if it decreases at the rate of 3 degree C per hour until midnight , at what time would the temperature be -3 degree C ? what would be the temperature at midnight

13. ## brilient stars

there is a frog inside a well 40m deep.the frog jumps 3m high and falls back 2m . in how many jumps will it come out of the well?

14. ## Calculus

1) yy'-e^x= 0, and y=4 when x=0 means that: A)y=x-lnx^2+4 B)y^2=4x^2+3 C)y=-2x+1/2x^3 D)y^2=2e^x+14 E)1/2ln|x^2+4|+6 2) The rate of change of P with respect to t is directly proportional to (10-t) and inversely proportional to the cube root of P. The

15. ## geometry

balloon has a circumference of 23 cm. Use the circumference to approximate the surface area of the balloon to the nearest square centimeter.

16. ## social studies

Latin America Unit 3 Test 1.Which is a key factor that affects the climate of mountainous Latin America? A.snow B.El nino C.elevation D.sea Breezes 2.which statement best describes the economies of central america? A.Central america's economy is dependent

17. ## Math

Billy is riding on a 20 meter diameter Ferris wheel that is making 3 revolutions per minute. What are your linear velocity and your angular velocity? If there are 8 equally spaced seats on the ferris wheel then what is the length of the arc between two

18. ## Physics

A body is allowed to slide down a frictionless track freely under gravity.The track ends in a semicircular shaped part of diameter d.What should be the height(minimum) from which the body must fall so that it completes the circle?

19. ## statistics

A vending machine company wants to check three of its machines to determine if they are properly dispensing 12 ounces of coffee. Their data is given below. Reference: Ref 11-4 Compute the test value for the coffee machines. Answer 2.25 5.06 6.62 4.86

20. ## brilient school

the melting point of mercury is -39 degree C .the freezing point of alcohol is -98 degree C .how much more is the melting point

Starting from rest, a man runs 10 metres along a straight path in t seconds. His position can be described by the function s(t)=0.7t^2. How long will it take him to reach the velocity of 4m/s? would the answer be 5.6 s? I started with s(t)=0.7t^2, then the

22. ## Calculus

1. If y′= x(1+ y) and y > -1 , then y= A) y=sinx B) y=3x^2+C

23. ## Algebra

Sumi can wash the windows of an office building in 3/4 the time it takes her apprentice. One day they worked on the building together for 2h 16min , then Sumi continued to work alone. It took 4h 32min more to complete the job. How long would it take her

24. ## Math

Susan's property is assessed at \$27,500. The property tax rate in her city is 3.25%. Find her property tax. how do i find it?

25. ## science

humans depend on natural resources for

26. ## Science (Human Population Growth)

How have advances in medicine and technology affected population growth?

27. ## Driver Education

Attention fatigue is the result of (1 point) physical exertion. boredom. mental exertion. lack of sleep. 2. Fatigue affects your ability to (1 point) understand traffic signals. perceive and respond to threats. recognize objects. avoid pedestrians. 3. The

1.Many freshwater invertebrates eliminate ammonia by: A. Converting it to uric acid and eliminating it with solid wastes. B. simple diffusion across the gill membranes. C. converting it to urea and eliminating it in their urine. D. simple diffusion across

29. ## Economics (42)

Consumption of alcoholic beverages by young women of drinking age has been increasing in the United Kingdom, the United States, and Europe (The Wall Street Journal, February 15, 2006). Data (annual consumption in liters) consistent with the findings

30. ## Algebra 1

Find the roots of each quadratic polynomial. 1. 16x + 40 + 2x^2 Solve. Round to the nearest hundredth. 2. 12 = 5x^2

31. ## Math

Wellesville must meet a budget of \$27,000. All of the city's income is derived from property tax. What rate of tax must they use if the assessed value of the taxable property is \$1,173,913? (Answer to tenths) how do you work this out?

32. ## Science, Chemistry

Hess's law ____. A) makes it possible to calculate ΔH for complicated chemical reactions B) states that when you reverse a chemical equation, the sign of ΔH does not change. C) determines the way a calorimeter works D) describes the vaporization of

33. ## Algebra

The function t=[(sqrt)(d/16)] models the time (t) in seconds that an object has been falling after the object has fallen d feet. When will the time be more than 1 minute? • d ≥ 16 ft • d ≥ 225 ft • d ≥ 3,600 ft • d ≥ 57,600 ft

34. ## Algebra

Yuritzi works at a sport shop she get paid \$10 hourly and on top of that \$2 for each item she sells. If she sells no items she gets paid 10, so the coordinates would be (0,10) if she sells 1 items she earns \$12 (1,12) if she sells 3 items she will get \$16

35. ## Physics

Two blocks are connected by a cord passing over a small frictionless pulley. The angle is 30 degrees, and the mass of the small block is m=15kg. If the coefficient of friction between the small block and the inclined plane is .25 and the large block is

36. ## Physics

As shown in the picture to the right, a ball is suspended from the ceiling by a string of negligible mass. When the ball is set into motion such that it moves in a horizontal circle at a constant speed of 1.6m/s, the tension in the string is 7.7N. What is

37. ## algebra

Let f(x)= 2x^2 +7 and g(x)= x – 6. (a) Find the composite function (f*g)(x) and simplify. Show work. (b) Find ( f*g)(1). Show work.

38. ## new neutrich high school

what is the independent and dependent variable if in every 29 minutes jogging burns 200 calories?

39. ## chemistry

20 mL of 0.125 M potassium iodide solution is mixed with 10 mL of 0.1 g L–1 sodium thiosulfate solution and 0.2 g of solid iodine indicator is added. To this solution is added 20 mL of 0.025 M peroxodisulfate solution. After 46 seconds a blue colour

40. ## Algebra

Two lamps can be connected to a battery in a circuit in series or in parallel. You can calculate the total resistance RT (t is down from r) in a circuit if you know the resistance in each lamp. Resistance is measured in ohms. For a circuit connected in

41. ## Economics (41)

A simple random sample of 60 items resulted in a sample mean of 96. The population standard deviation is 16. a. Compute the 95% confidence interval for the population mean (to 1 decimal). ( , ) b. Assume that the same sample mean was obtained from a sample

42. ## math

19. a prototype rocket burns 159 gallons of liquid hydrogen fuel each second during a regular launch. Make a table that shows how many gallons of fuel are burned after 2,3,5 and 10 seconds. (3 points) can you help me Ms.Sue

43. ## Algebra

Two pipes fill a storage tank in 9 hours. If the larger pipe fills the tank three times as fast as the smaller one, how long would it take the larger pipe to fill the tank alone? In terms of your variable, what fraction of the tank is filled in 1 h by the

44. ## Math

Identify the sequence as arithmetic, geometric, or neither. Explain your answer. 1.6, 0.8, 0.4, 0.2 . . .

45. ## capstone citical thinking

Catherine goes to her local movie theater only to see romantic comedies. Since Catherine did not go to the movies yesterday, there is not a romantic comedy playing at her local theater. The reasoning above is flawed because the evidence

46. ## Algebra

Two lamps can be connected to a battery in a circuit in series or in parallel. You can calculate the total resistance RT (t is down from r) in a circuit if you know the resistance in each lamp. Resistance is measured in ohms. For a circuit connected in

Determine the slope of the tangent line to the curve y=(x^2+3x)(x^2-2) at x=-1. I got 3 as my answer although I am not too sure that it's correct. I found the derivative of the function and then substituted -1 into the equation.

48. ## Math

Is 0.67676768 a terminate or a repeat ?

49. ## math

Katy babysat to make some money, but Katy has not worked any hours so (x=0), she has not earned any wages so (0,0) would be one coordinate. Katy earns 10 dollars an hour. She then worked 3 hours, so she now has \$30.00, so (3,30)is another point. Katy

50. ## Calculus

write the equation of line tangent to f(x)=(1/3x^3)-x^2+x-1 when x=1

51. ## Algebra

3/(s - 1) + 1 = 12/(s^2 - 1)

52. ## chemistry

hydrogen may not be advantagous as a fuel because

53. ## Physics

A 2kg begins at the top of a 1m high frictionless, inclined plane on top of a 1.5m high table. If it is loaded onto a spring with spring constant 50N/m and compressed 10 cm from equilibrium and then released, how far from the edge of the table will the

54. ## Physics

A 10kg box is initially at rest 10m above the ground level on top of a hill. The box starts to slide down the hill and when it reaches ground level it has speed 10m/s. Was there a friction force between the box and the ground? If so how much work did the

55. ## Science

What is true about the element francium (Fr, atomic number 87)? Choose all that apply. A) It has seven valence electrons. B) It is likely to form ionic bonds. C) It is in Period 7. D) It is nonmetal. E) It is a metal. I think its B, C, E. Am I right?

56. ## Physics

A baseball is thrown from the roof of 23.5m -tall building with an initial velocity of magnitude 10.0m/s and directed at an angle of 53.1∘ above the horizontal. a.What is the speed of the ball just before it strikes the ground? Use energy methods and

57. ## history

under south africa's ______system, four legally unequal racial groups included whites,_______,blacks, and people of mixed race.

1. Determine the slope of the tangent to the graph of y=4/x at (1,4) my answer is -4 2.What is the slope of the line perpendicular to y=(x-2)/(x+2) at (2,0) my answer is -4 3. For which value of x is the derivative of f(x)=(x-1)^10(x+2)^5 equal to 0? my

59. ## DR.bOBB

areu skipping questions? i typed all that in hope you would help me out

60. ## Math

12.5 of 180 = ?

1) The essential question for the last few lessons asks "How did Canada seek to establish economic security and social justice from the period of the depression to the patriation of the Constitution? What kind of economic security did the Canadians seek?

62. ## math

An industrial machine made 63 shirts. If it takes 7 minutes to make each shirt, how many minutes was it working. A. 63+7 B.63-7 C.63x7. My answer is C.

63. ## tourism

how location influence tourism(gauteng)

64. ## Math

Simplify!! 54 a^2 b^3 ___________ 81 a^3 b^2 Choices are:: A. 2/3 a^2 b B. 2a^2 ____ 3b

65. ## math

Naomi has 50 red beads and white beads together the # of red beads is 1 more than 6 times the# of white beads how many red beads does naomi

66. ## Calculus

Let s(t)=-5t^2+40t be the position equation for a rock thrown upwards. At what time t, in seconds, will the rock change directions?

67. ## Algebra

I am not sure I am writing this correctly: What is the domain of the function y=3(sq rt)6x+42 • x ≥ 0 • x ≤ 7 • x ≥ –6 • x ≥ –7

68. ## Algebra

A passenger boat which travels 6 mph faster than a freighter required 3 days less time to make a trip of 2592 miles. Find the rate of the passenger boat.

69. ## Trig

Use trigonometric identities to solve the equation csc^2x -(√3+1)cotx+(√3-1)=0 in the interval [0, 2pi]

70. ## Math

For the first of two basketball games the price of each reserved seat was \$1.50,the price of each unreserved seat was 5 cents, and the number of reserved seats sold was 1/25 of the number of unreserved seats sold.If, at a second game, the price of the

71. ## Maths

Find the exact value of cos^2(15°)-cos^2(30°)+cos^2(45°)-cos^2(60°)+cos^2(75°)

72. ## Sociology / Anthropology Help Please!!!

Why is art created? Give five examples of human creative expression, including one form that you personally practice or enjoy.

73. ## MATH

Please help I am supposed to verify that cot^2x+tan^2x =sec^2xcsc^2x-2 I just can't seem to get the two equations to equal to each other.

74. ## Algebra

The area of a rectangular piece of land is 280 square meters. If the length of the land was 5 meters less and the width was 1 meter more, the shape of the land would be a square. Part A: Write an equation to find the width (x) of the land. Show the steps

75. ## physics

If a cyclist moving with a speed of 4.9 m/s on a level road can take a sharp circular turn of radius 4 m,then what is the coefficient of friction between the cycle tyres and the road?

76. ## chemistry

What would be the freezing and boiling points of a solution of 5.00g of sodium chloride dissolved in 25.0g of water?

77. ## Anthropology!!!

Discuss the mechanisms of culture change. How can anthropology help one maintain a balanced perspective in a changing world?

78. ## Chemistry

What would be the freezing and boiling points of a solution prepared by dissolving 1.00g of benzoic acid (C6H5CO2H) in 10.0g of benzene?

79. ## Economics (36)

For borrowers with good credit scores, the mean debt for revolving and installment accounts is \$15,015 (BusinessWeek, March 20, 2006). Assume the standard deviation is \$3,730 and that debt amounts are normally distributed. a. What is the probability that

80. ## Algebra

A chemist has one solution that is 80% acid and a second solution that is 30% acid. How many liters of each solution will the chemist need in order to make 50L of a solution that is 62% acid?

81. ## math

Suppose that you are taking a course that has three exams which count for three-fifths of your grade and a final which counts for two-fifths of your grade. On your first three tests your scores on were 84, 72, and 96. To get an B in the course, you must

82. ## Mathematics

I need help finding the exact value of sin (a + b), given that sin a =3/5 and sin b = 5/13, with a in quad 2 and b in quad 1.

83. ## maths

Determine the length and breadth of a rectangle if the length is 3cm less than twice the breadth, and the perimeter is 18 .

84. ## Physics

50.0pJ of energy is stored in a 3.00cm × 3.00cm × 3.00cm region of uniform electric field.

85. ## English

1. Coins were made from gold and silver. 2. Coins were made of gold and silver. ------------------ Which one is grammatical?

86. ## physical

Displacement time graph and velocity time graph is equall to describe motion of particles.

87. ## Calculus

1.a)Determine dy/dx if y= sqrt[(3x^2+2)^3] For this question, I got 9/2x(3x^2+2)^1/2 as my answer. b)State any values of x for which the function is not differentiable

88. ## Chemistry

The pH of a .200M HBrO solution is 4.67. What is the acids Ka?

89. ## College Physics

A 3.00-cm-diameter parallel-plate capacitor with a spacing of 0.800mm is charged to 300V . What is the total energy stored in the electric field?

n-2n^2=0

91. ## Calculus

If y=u^3+u^2-1, where u=1/(1-x), determine dy/dx at x=2

92. ## Algebra (proportions)

To estimate the size of the bear population on the Keweenaw peninsula conservationists captured tagged and released 50 bears. One year later a random sample of 100 bears included only 2 tagged bears. What is the conservationist estimate of the size of the

93. ## Math

For amounts between \$10,000 and \$24,999, a credit union pays a rate of 2.5% on term deposits with maturities in the 91- to 120-day range. However, early redemption will result in a rate of 1.75% being applied. How much more interest will a 91-day \$20,000

94. ## College Physics

Metal sphere 1 has a positive charge of 7.00nC . Metal sphere 2, which is twice the diameter of sphere 1, is initially uncharged. The spheres are then connected together by a long, thin metal wire. What are the final charges on each sphere?

95. ## Math

What's the answer to 1^2-(2-x)^2=2^2-x^2 The answer said x =7/4 But no matter how I tried. I couldn't get that

96. ## math

A cow is attached to a rope 10 feet long in a pasture bordered by two fence( more than 10 feet long) meeting at an angle of 60 degree. What is the area of the space in which the cow is grazing? a. 20 pi b. 5 pi /3 c. 20 pi /3 d. 50 pi /3 e. 100 pi please

97. ## Algebra

the learning curve describes the rate at which a person learns certain tasks. If a person sets a goal of typing N words per minute (wpm), the length of time t (in days) to achieve this goal is given by t= -62.5 IN (1- N over 80) according to this formula,

98. ## history

1) The essential question for the last few lessons asks "How did Canada seek to establish economic security and social justice from the period of the depression to the patriation of the Constitution? What kind of economic security did the Canadians seek?

99. ## math

A picture 15 inch x 30 inch is surrounded by a mat 2 inch wide.The aea of the mat in swuare inches is a. 60 b. 94 c. 124 d. 128 e. 196 I know the answer is e, but i don't know how to do it, anyone can tell me how to do it, thank you

Evaluate the indefinite integral Note: Use an upper-case "C" for the constant of integration. integral sqrt(100x^2-400)/x dx Ty

101. ## Math

The radius of the inscribed circle is 5. If the length of the hypotenuse of the right triangle ABC is 19, what is the perimeter of the triangle?

102. ## History Re-post

1) The essential question for the last few lessons asks "How did Canada seek to establish economic security and social justice from the period of the depression to the patriation of the Constitution? What kind of economic security did the Canadians seek?

103. ## Math

In a circle whose radius is 13 cm, a central angle intercepts an arc that measures 65o. What is the arc length? Round your answer to the nearest hundredth of a centimeter.

Deermine the derivative of f(x)=[(3x^2+1)^3+1]^2. Express your answer in simplified form. For this I got 54x^6+162x^5+54x^4+108x^3+18x^2+18x+2

105. ## math

What is the area of a parallelogram where the base= 3x+1 and the height= 9. I know the area is base*height but does that mean you distribute the 9?

106. ## math

Your income tax withholding is dependent on

107. ## math

income is subject to federal taxes

108. ## Stats

A researcher wants to estimate the mean serum cholesterol level for college age women. In a past study the standard deviation for this measure was 42 units. of the researcher wants to be off in his estimate by no more than three units (with 99% confidence)

109. ## brilint stars

there is a frog inside a well 40 m deep. the frog jumps 3 m high and falls back 2m . in how many jumps will it come out of the well ? (answer is 38 ) how

110. ## math

In triangle ABC, AB=2 square root 2, BC=8,angle ABC=45 degrees.Find area ABC. a. 4 square 2 b. 8 c. 8 square 2 d. 16 e. 16 square 2 please answer and explain

111. ## Math (Calculus)

Use the disc method to find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the indicated line. y=x^3, y=0, x=2 a)the x-axis b)the line x=4

112. ## Math

If a circle is inscribed in a triangle with vertex angles 30o - 60o - 90o , then what is the area of the triangle divided by the area of the circle?

113. ## Math (Calculus)

Determine the area of the region y=e^x,y=x^3

1.Many freshwater invertebrates eliminate ammonia by: A. Converting it to uric acid and eliminating it with solid wastes. B. simple diffusion across the gill membranes. C. converting it to urea and eliminating it in their urine. D. simple diffusion across

115. ## Statistics

(25 pts, 5 pts each) The ounces of coffee that a machine dispenses in 5-ounce cups have normally distributed. Suppose a sample of size 6 was taken from this machine, as shown as follows: 5.05 5.03 5.10 5.02 4.98 5.00 (for all calculations, keep at least

116. ## math

Given a circle A whose diameter is 2 ft.and a rectangular piece of tin B,10ft by 4 ft.Find, correct to the nearest square foot, the tin that will be left after the greatest possible number of circles of the size of A have been cut from B. a. zero b. 1

117. ## math

The ratio of boys to girls in a senior class is 5:3. If 9/10 of the boys may graduate and all the girls may or may not graduate, what is the maximum part of the senior class that may graduate? a. 3/5 b. 7/8 c. 15/16 d. 2/3 e. 27/50 please answer and

118. ## Statistics

) In a rural area, the infected rate of certain disease is 0.20 (i.e., 20%). A sample of 20 people is taken from the area - selections are independent. Define X as the number of people in the sample who are infected by the disease. (1) This X is a binomial

119. ## math

can you help me out with this one Ms. Sue Explain how to write a function rule from the table below. Then write the function rule. x 2 4 6 y 1 0 -1

120. ## math

George has 6 black pens, 4 red pens, and 12 pencils in his desk drawer. If he reaches into his desk drawer and randomly selects something to write with, what is the probability that he will grab a pen?

121. ## math

Four similar glass tumblers just fit into a cubical box.The area of the top of the circular cover of any one of the tumblers is 4 pi.The area of each side of the box is a. 16 b. 32 c. 32 pi d. 64 e. 64 pi please answer and explain

122. ## health

What is an example of how adults can develop knowledge to attain goals if running is a goal

123. ## health

Exercise can help prevent

124. ## math

If the operation # is defined by the equation x # y = 2x + y,what is the value of a in the equation 2 # a = a # 3 ? a. 0 b. -1 c. 1 d. 1.5 e.-1.5 f. 2

125. ## health pllz help me i have trouble

1. Haley is excited about a new activity she learned about while surfing the Internet called orienteering. Which community group would most likely be able to give her a good start in this activity? (1 point)church youth group dance team drama club Girl

126. ## math

The enrollment in a university is now 52,500, an increase of 5% over the enrollment last year.By how many students did the enrollment increase this year? a. 2500 b. 47,500 c. 50,000 d. 55,000 e. 57,750 f. 60,000

127. ## ALGEBRA

When will the dependent variable in the equation Y=[(sqrt)(x+4-3)] equal or exceed 4? • x ≥ –0.17 • x ≥ 45 • x ≥ 48 • x ≥ 53 Show how.

Which of the following types of joints allows the type of shoulder motion needed by a baseball pitcher to pitch a fastball in a baseball game? pivot *** gliding hinge ball and socket 2. Which of the following pairs of joints represents the same type of

129. ## Algebra 1

Find the roots of each quadratic polynomial. 1. 16x + 40 + 2x^2 A: No real solutions? Solve. Round to the nearest hundredth. 2. 12 = 5x^2 A: 12 = 5x^2 12 / 5 = 5x / 5 12/5 = x^2 ±2√3/5 = ±√4x3/5 = ±√12/5 = x x = ? (Supposedly, the answer to this

130. ## HELP!!!!!!!!!!!!

What GPA (percentage not on 4.0 scale) makes the top five percent at your high school class? Out of 225 students

131. ## physics

Hello! I'm studying for physics and I am stuck on this question (I have the answer): Two identical cars are travelling on a horizontal road, one of them is going at twice the speed of the other one. Both break using the same force. The slower car breaks

132. ## Algebra

When will the dependent variable in the equation Y=[(sqrt)(x+4-3)] equal or exceed 4? • x ≥ –0.17 • x ≥ 45 • x ≥ 48 • x ≥ 53

133. ## chemistry

The vapour density of a gas is 22.4 and mass is. 22.4grams.what is the volume occupied the gas at N .T .P ?