1. math (cant figure it out)

Grade 7 students were surveyed to determine how many hours per day they spent on various activities. Eating is 8%, homework is 8%, sleeping is 33%, TV is 13%, socializing 13%, and school is 25%. About how many hours per day altogether were spent on

2. math 8th

Find the circumference of the given circle. Round to the nearest tenth. circle (1 point) 22.0 cm 38.5 cm 11.0 cm 42.8 cm

3. English

Choose the correct usage to complete the sentence: Are you ______________ to be in here? Suppose or supposed

4. math

A bicycle wheel has a diameter of 63cm.calculate how many times the wheel turns round in travelling 19.8km. Use the value 3 1/7 for pi

5. Math

Hello I was wondering if you can help me with a question, I cant seem to figure it out. Q: A cone has a radius of 24 cm and a volume of 1,920 cm. What is the volume of a similar cone with a radius of 18 cm? A: 480 cm B: 810 cm C: 1,080 cm D: 1,440 cm

6. chemistry

what type of reaction occurs Fe3O4 + 4H2 → 3Fe + 4H2O

7. Stats Class HELP!

Twenty-five blood samples were selected by taking every seventh blood sample from racks holding 187 blood samples from the morning draw at a medical center. The white blood count (WBC) was measured using a Coulter Counter Model S. The mean WBC was 8.636

8. Chem

AgNO3 solutions are often used to plate silver onto other metals. What is the maximum amount of silver in grams that can be plated out of 4.2L of an AgNO3 solution containing 3.1% Ag by mass?

9. Social Studies

Which of the following is a reason why Turkey is not as advanced as other European countries when considering the economy? A. A large part of the Turkish economy is agriculture. B. Turkey did not have enough trade barriers. C. Turkey does not have any

10. calculus

A person 150cm tall is walking away from a lamp post at the rate of 15 meter per minute. when the man is 2.5m from the lamp post, his shadow is 3m long. Find the rate at which the length of the shadow is increasing when he is 7m from the lamp post.

11. MATH

An open box with a square base is to be made from a square piece of cardboard 24 inches on a side by cutting out a square of side x inches from each corner and turning up the sides.Graph V=V(x)

12. Math

A man looks up at the top of a tree. The angle of elevation is 42 degrees. If the tree is 20 feet tall, which of the following best represents the distance from the base of the tree where the man is standing?

13. mathematics

a drinks machine dispenses coffee into cups. A sign on the machine indicates that each cup contains 50 ml of coffee. the machine actually dispenses a mean amount of 55ml per cup and 10% of the cups contain less than the amount stated on the sign. assuming

14. Chemistry

A flask was immersed in 350 g of water at 25 degrees C. Steam at 100 degrees C was passed into this flask, and eventually condensed into water at 100 degrees C. If the temperature of the water surrounding the flask was raised to 70 degrees C, how many

15. Physics

A large water tank has an inlet pipe and an outlet pipe. The inlet pipe has a diameter of 2.19 cm and is 2.13 m above the bottom of the tank. The outlet pipe has a diameter of 5.49 cm and is 4.85 m above the bottom of the tank. A volume of 0.359 m3 of

16. Physics

The acceleration due to gravity on Earth is 9.80 m/s2. If the mass of a dog is 40.0 kg, what is the weight of the dog?

17. Social Studies

Which question would be best to consider when researching the effects of oil in the Middle East? A. Why are there larger oil reserves in some countries compared to other countries? B. In which country in the Middle East are the largest oil reserves? C. How

18. Science

What is the main benefit of using scientific names instead of common names for organisms?   Scientific names have been around for much longer than common names have. Scientific names give everyone a shared terminology while common names can vary around

19. physical

You are playing a note that has a fundamental frequency of 440.00 Hz on a guitar string of length 59.1 cm. At the same time, your friend plays a fundamental note on an open organ pipe, and 4.0 beats per seconds are heard. The mass per unit length of the

A piece of wire 14 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral triangle. (a) How much wire should be used for the square in order to maximize the total area? 14 m this one I got right (b) How

21. Economics

What percentage of income is spent on lottery tickets by (a) A poor family with an income of \$19,000 per year who purchase the average amount of lottery tickets for their income bracket?

22. chemistry

what is the pH of 0.80 M NaCN? what is the pH of 0.80 M NaCN? What is the concentration of HCN in the solution? I did this so far: I 0.8..... 0....0 C -x.......x....x E 0.8-x....x....x (x)(x)/0.8-x How do I solve for x?

23. math

Katrina's ski boots cost 8% more than her skis.Her ski boots cost \$162. Whick equation can be used to find the cost, c, of Katrina's skis? a. c + 0.08c =162 b. c + 0.8c = 162 c. c - 0.08c = 162 d. c - 0.8c = 162 please answer and explain

24. English

1. Take exercise on a regular basis, and you will be a happy person. 2. Earn a lot of money, and you will be a happy person. 3. Drive in the country, and you will be a happy person. 4. Play the violin, and you will be a happy person. 5. Play soccer with

25. Paper Writing

I am writing a paper where I cite multiple lectures by the same professor. How do I format the intext citations?

26. Applied mathematics

Steve mixes together 1 6/8 gallons of apple juice, 1 3/8 gallons of orange juice, and 1 1/8 gallons of cranberry juice. How much fruit punch does he make?

27. Stats

Of 43 bank customers depositing a check, 18 received some cash back. (a) Construct a 90 percent confidence interval for the proportion of all depositors who ask for cash back. (b) Check the normality assumption.

28. math

Regis has a bag with 8 tiles numbered 1 through 8. He randomly draws one tile from the bag without looking.Which of the following decribes a likely outcome? a. He selects a tile with the number 0. b. He selects a tile with the number 4. c. He selects a

29. math

ABCDEF is a regular hexagon. If the perimeter = 12 find the area of ABCDEF.

32. Chemistry

A 1.0 liter flask is filled with a mixture of two gases at 20. oC until a pressure of 14.43 atm is established. If 0.40 grams of the mixture is hydrogen, how many moles are there of the other gases?

33. Algebra 1

4 pencils and 5 pens cost \$2.00; 3 pencils and 4 pens cost \$1.58. Write out a system of equations that would represent this situation.

34. Math

A bag contains nine red marbles, four green marbles, three blue marbles, and two yellow marbles. If Lisa draws a random marble from the bag, what is the probability that it will be a red, green, or blue marble?

35. physics

Two stars are 4.40 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.03 m and just detects these stars as separate objects. Assume that light of wavelength 550 nm is being observed. Also assume that

36. Physics

1) Determine the extension of the trampoline when a 200 kg person stands on the trampoline. (k=12000) 2) If on the first push, the trampoline went 8.0 cm below its position in part 1, find the average force exerted by his leg muscles? For the first

37. calculus

A bug crawls along the graph of 2 y x x    4 1 , where x and y are positive and measured in centimeters. If the x-coordinate of the bug’s position x y,  changes at a constant rate of 3 cm/min, how fast is the y-coordinate changing when the

38. Calculus

Find the derivative of the following function using the appropriate form of the Fundamental Theorem of Calculus. intergral s^2/(1+3s^4) ds from sqrtx to 1 F'(x)=?

39. Calc

Find the derivative of the following function using the appropriate form of the Fundamental Theorem of Calculus. intergral s^2/(1+3s^4) ds from sqrtx to 1 F'(x)=?

40. Stats Class

The EPA city/hwy mpg range for a Saturn Vue FWD automatic 5-speed transmission is 20 to 28 mpg. If you owned this vehicle, how large a sample (e.g. how many tanks of gas) would be required to estimate your mean mpg with an error of ±1 mpg and 90%

41. sociology

A research study being conducted to test the effects of administering nicotine to healthy volunteers, who have never smoked, nor used any tobacco products, on their attention and memory would most likely require which level of IRB review? (Points : 1)

42. Algebra

Add... 8 + (x-1) / (x+4)

43. science

Water is flowing in a pipe as depicted in the figure. As shown, p = 113 kPa, d = 4.57 cm, d' = 3.22 cm, v = 4.40 m/s, and h = 1.25 m. What pressure is indicated on the upper pressure gauge? Take y = 0 at the bottom of the left pipe so that the center of

44. Calculus Help and Check

1)Find the most general antiderivative of the function. (Check your answer by differentiation. Use C for the constant of the antiderivative. Remember to use ln |u| where appropriate.) f(x) = (1/5)−(3/x) -----> (x/5)-3lnx+C 2)Find f. f ''(x) = 4 + 6x +

45. Calculus2

Consider the function f(x) whose second derivative is f''(x)=8x+4sin(x). If f(0)=3 and f'(0)=2, what is f(x)?

46. financial analysis

A zero coupon bond with a par value of 1,000 has 15 years to maturity. If the YTM is 6.2% what is the current price of this bond?

47. math

A cow is attached to a rope in a pasture bordered by two fences ( each 60 feet long) which meet at an angle of 24 degree. If the rope attached to the cow is 15 feet long, over how many square feet can the cow graze? a. 2 pi b. 15 pi c. 30 pi d. 45 pi e.

48. geology

Building Isochrons and Determining the Ages of Three Rocks Page 15 of 17 For each of the three rocks listed below follow these steps to determine the rock's age of formation. 1. Prepare an isochron by plotting the points that represent the amounts of

49. Chemistry

A sample of a gas has a volume of 250. mL at 2.10 atm and 227 oC. What volume will it have at standard temperature and pressure (STP)?

50. Physic

Water enters a horizontal pipe with a rectangular cross section at a speed of 1.00 m/s. The width of the pipe remains constant but the height decreases. 27.3 m from the entrance, the height is half of what it is at the entrance. If the water pressure at

51. statistics

The mean score for all individuals who took the Law School Admission Test (LSAT) in 2010 was 155 and the standard deviation was 7. 9. What is the z score for a person, who received an LSAT score of 167? a. +1.71 b. +1.64 c. +1.74 d. -1.71 10.What is the

52. physics

A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true?

53. Civics

Which best describes how the internet has contributed to cultural diffusion in the united states?

54. coputer

Write a program that asks the user to enter the high temperature for each day of one week. Store the temperatures in an array. Once completed, output all temperatures that have been stored into the array.

55. science

explain the Eutectic and Eutectoid reaction in cast irons

56. stastic

A can of Coke is supposed to contain, on the average, 16 ounces of soda with a standard deviation of 0.4 ounces. Suspecting fraud, you take a random sample of 50 cans and measure the amount of Coke in each. Your measurements show that the 50 cans had a

57. Math

WE HAD TWO PIZZAS JIM ATE 3 SLICES OF ONE AND KATE ATE 1/4 OF THE OTHER ONE.WHO ATE THE MOST?

58. Social Studies

Which of the following facts could be best used when supporting Kurdish independence? A. Most of the Kurdish people are not Shia Muslims, but are Sunni Muslims. B. Outside governments have repressed Kurds harshly before. C. Kurds were included in Iraq by

59. budgiting

Which one of the following statements best describes a budget "blind spot"? A. Too little money was set aside to cover an expense. B. This is an expense the person overlooked or did not account for when setting up the budget. C. This is an item that

60. agriculture

1. name two negative effects of low pH 2.name two effecof low alkaline soil 3.name 3 causes of soil acidification 4.name two causes of brackish soil

61. cost accounting

Marvin’s Motors Company (MMC) manufactures outboard motors for use on small to medium sized boats. MMC produces three models: the Standard, the Deluxe and the Performance. The company uses a normal job costing system with manufacturing overhead applied

62. Statistics

A sample of 50 homes in a subdivision revealed that 24 were ranch style. a) Construct a 98 percent confidence interval for the true proportion of ranch-style homes b) Check the normaility assumption.

63. Stats. Class

a. What sample size would be needed to estimate the true proportion of students at your college who are wearing backpacks, with 95% confidence and and error of +/-0.04? b. What sampling method would you recommend? Why?

64. Science

How does DNA get passed from one generation to the next?

65. sociology

Miranda has a theory that some people are able to “see the future.” She has tested this theory and found that she is unable to produce an individual with above chance predictions. She revises her theory to explain that when asked about the future,

66. math

15. which of the following figures will not tessellate the plane? a. rhombus b. equilateral triangle c. regular hexagon d. regular pentagon

67. Math

A ramp has a height of 3 feet and a base of 12 feet. Which of the following best represents the angle of elevation? A. 14 degrees B. 16 Degrees C. 18 Degrees D. 20 Degrees

68. Math

A ball is filled with helium. If the ball has a diameter of 24 inches, what is the maximum amount of helium that the ball may hold?

69. Psychology

Is Gender a social construct referencing cultural behavioral expectations for men and women

70. statistics

Scores on a national exam assume a normal distribution with a population mean of 50 and population standard deviation of 10 points. A sample of 36 exam scores was selected from UCA with a mean score of 58 points. Using a significance level of 0.01,

71. Physics

f a 40 kg weight and a 200 kg weight each dropped from 1 m above the trampoline, find the final position of each weight. Assume the trampoline is a simple spring obeying Hooke's law with a k value of 12 000 N/m. I was able to get the answer to this, using

72. psychology

Traumatic events do not always result in a diagnosable psychological disorder What factors determine how a person may be affected by one such event?

73. mathes

how do calculate this 55 divided by 3500

74. Statistics

Hi, Are market returns (with numbers such as -3.45, 4, 2.456 representing the "returns") ordinal or nominal data? Thanks!

75. math

when the price of a box of peanuts is increased by 30% its sales decreased by x% such that the revenue decreased by 9%.what is the value of x?

76. Calc Help

Find the most general antiderivative of f(x)=–8e^x–6secant^2(x), where -pi/2

Hi this is my lead for a old court case I was assigned. The Michigan Court of Appeals finds no error in the trial courts disposition of favoring defendant Ionia Sentinel-Standard newspaper entry of summary judgment over the plaintiff’s claims regarding

78. statistics

in throwing two dice find the probability ofcoming even number on both probability of coming odd number on dice probability of different number on both dice

79. Psychology

Changes based on biological and psychological forces are functions of

80. MATH FACTOR POLYNOMIALS

Factor the polynomial. Please show all work. x^2+2x-3

81. ethical systems

religion and common law ethical systems identify the common as well as contradictory elements between the two systems

82. alg

(7 − i)(2 + i)

83. Math

z+1/z=2; z=? (1/z is a fraction) Please show work. I got C.1 as my answer. A.Square root of 3 B.1/2 C.1 D.1 1/2 E.2

84. algebra 117

f(x)= (x+8)^2 right 15 units

85. math 117

determine equation for g(x) that results from translating the function f(x)=x^2 +5 upward 6 units

86. Algebra

finding the equation to the perpendicular lines. y=x+4; (-7,1)

87. Teachers aide

A loss of a parent is considered to be an example of a/an ______stress?

88. English

1. I don't read the novel yet. 2. I cannot start to do the work yet. 3. I will not open the bottle yet. 4. I don't want to go there yet. ------------- Are they all grammatical?

89. math

Use the following to answer question 7: Point Bread Tractor A 20 0 B 18 1 C 14 2 D 8 3 E 0 4 Refer to the above schedule. Starting at point A, the opportunity cost of producing each successive unit of tractors is: a constant 2 units of bread 8, 6, 4, and 2

90. Precalculus

Prove that the left side equals the right side Tan + sec -1 / tan -sec + 1 = tan + sec

91. English

1. Plant the potato pieces deep in the ground. 2. Plant the pieces of potato deep in the ground. 3. Plant the pieces of potatoes deep in the ground. (Which one is grammatical?)

92. health

I have not seen any question to answer

integral (t^3=6t^2+4)dt from 0 to x f''(x)=?

94. statistics

a box contain five silp of paper marked 1,2,3,4and5 tow silp are selected without replacement,list the possible vaule for each of following random variable the sum of two number on two silp the difference between the first and second number

95. Stats

Find the 95 percent range for the sample mean, assuming that each sample is from a normal population. a. ì = 200, ó = 12, n = 36 b. ì = 1,000, ó = 15, n = 9 c. ì = 50, ó = 1, n = 25

96. math

If Ѳ is in Quadrant II, and cos Ѳ=-3/4 , find an exact value for sin 2Ѳ.

97. Statistics

A random sample of 47 students studied for an average of 7.1 hours last week. If the population standard deviation is 1.2 hours, what is the 90% confidence interval for the population mean?