Marilyn

Most popular questions and responses by Marilyn
1. Statistics

Retired workers and disabled workers both receive Social Security benefits. What information would we need to test the claim that the difference in monthly benefits between the two groups is greater than \$30 at the 0.05 level of significance? Write out the

2. Physics

A 185kg refrigerator is loaded into a van by moving it up a 10.0m long frictionless ramp that is at an angle of 11.0 degrees. How much work is done?

3. Math

That ratio of men to women at a lecture is 2 to 5 a total of 63 people are at the lecture how many are men explain how you found your answer

4. Psychology

Is my answer correct I said the correct answer is D Regarding cultural differences in self-esteem, which of the following statements is/are TRUE? a. People from Eastern cultures are more likely to engage in self-criticism. b. The self-esteem for people

5. math

joe cut three acres of grass at the smith farm which is 15% of the property. how many acres are on the smith farm? f. 15 acres, g. 20 acres, h. 30 acres, j. 45 acres 15x3 45 acres?

6. Physics

1. Suspend the meter stick by a string from its center. 2. Notice carefully where it balances. It probably will not balance exactly at 50 cm. All distances must be measured to this point (called the fulcrum). 3. Hang a 200 g mass on one side and a 50 g

7. Psychology

Can someone please tell me whether or not these answers are correct. Thanks! 1. Regarding the memory processes, incoming information is first _______, then stored, and finally the memories must be _______, or taken out of storage to be useful. a.

8. chemistry

caculation: 2Na3PO4(aq)+3BaCl2(aq)-> 6NaCl(aq)+Ba3(PO4)2(s) a)determine the maximum g of Ba3(PO4)2 that can be formed from your mass of Na3PO4x12H2O b)determine the maximum gram of Ba(PO4)2 that can be formed from your mass of BaClx2H2O

9. geometry thank you last one

A square pyramid and a rectangular pyramid have the same height. The base area of the square pyramid is half the base are of the rectangular pyramid. Compare their volumes. I think that the volume of the square pyramid is 1/2 the volume of the rectangular

10. math

trapezoid abfe is similar to trapezoid efcd. a 3 b e 4.5 f d c What is the length of ___? DC

11. Word Problem

The mean arrival rate of flights at O’Hare Airport in marginal weather is 195 flights per hour with a historical standard deviation of 13 flights. To increase arrivals, a new air traffic control procedure is implemented. In the next 30 days of marginal

12. Satistics

What is the probability that two 5 year old stink bugs will live to 6 years old?

13. math

at a grocery store a 12 pack of 10.75 ounce cans of soups is sold for \$15.65. there are 128 ounces i10.75x12=n a gallon. round to nearest cent. f.\$0.64,\$9.47,h.\$9.52,j.\$15.53 10.75x12=129 \$15.53?

14. Physics

1. Suspend the meter stick by a string from its center. 2. Notice carefully where it balances. It probably will not balance exactly at 50 cm. All distances must be measured to this point (called the fulcrum). 3. Hang a 200 g mass on one side and a 50 g

15. physics

four uniform spheres, with masses MA= 100kg, MB= 650 kg, MC= 1800 kg, and MD = 100 kg, have (x,y) coordinates of (0, 50 cm), (O,O), (-80 cm, 0), and (40,0) respectively. What is the net gravitational force F2 on spere B due to the other spheres?

16. engineering

A cylinder has 500 cm^3 of water. after a mass of 100 grams of sand is poured into the cylinder and all air bubbles are removed by a vacuum pump, the water level rises to 537.5 cm^3. Determine the specific gravity of the sand?

17. English

Help me do a essay about going to someone Birthday party and planning what to buy him a present 1)computer 2)hiking bag 3) chocolate 4) sport shoes By using a dialog for 4 person Ps point are ready only need to do essay

18. Math - Calculus

A boat is pulled into a wharf by a rope at a speed of 20m/min. If the rope is attached to a point on the boat 7m vertically below the wharf, at what rate is the rope being drawn in when the boat is 24m from the wharf?

write this in exponential form ^7 square root of b (7 is on outside as an exponent) thanks!

20. Algebra; Help immediately.

The height of a ball that was batted into the air at 160 feet per second is a function of t, the time in seconds after the ball was hit. The height is determined by subtracting 16 times the square of t from 160 times t. Which equation can be used to find t

21. Math

A ladder 5m long is standing vertically, flat against a vertical wall, while its lower end in on the horizontal floor. The lower end moves horizontally away from the wall at a constant speed of 1m/s while the upper end stays in contact with the wall. Find

22. Statistic

A restaurant that bills its house account monthly is concerned that the average monthly bill exceeds \$200 per account. A random sample of twelve accounts is selected, resulting in the sample mean of \$220 and a sample standard deviation of \$12. The

23. physics

A rope of negligible mass pulls a 38-kg block block vertically upward with a constant acceleration of 6.0 meters per second squared. What is the tension of the rope?

24. Word Problem

The Web-based company Oh Baby! Gifts has a goal of processing 95 percent of its orders on the same day they are received. If 485 out of the next 500 orders are processed on the same day, would this prove that they are exceeding their goal, using á = .025?

25. Math

Solve each question xˉ² = 4

26. Math

The Walters' backyard pool is rectangular in shape and is similar to the rectangle formed by their fenced backyard. The pool measures 10 ft long and 8 ft wide. If the length of the backyard is 35 ft long, what is the width of the backyard?

27. math

Mario rolled a number cube labeled 1-6 sixty times. In what percent of the rolls did Mario roll a number less than 4?a.5%,b.33%,c.50%,d.55% # #of x rolled 1 16 2 12 33/60 x/100 3 5 3300/60=55? 4 8 5 12 6 7

28. accounting

The following was taken from the records of Smith Company in the year ending December 31, 2014. Journalize the following transactions in an Excel spreadsheet for year-end 2014 using the aging method. Assume that the allowance for doubtful accounts has a

29. chemistry

Calculate the molarity of a solution prepared by dissolving 25.0 g NaCl in 1.0 L solution.

For what values of x is the graph of y = 8e^−x^2 concave down? (Enter your answer using interval notation.) I started by finding the second derivative and factoring and ended up getting 16e^-x^2 (2x^2-1) and I know up till this part that I'm doing the

31. Chemistry

What is the final concentration of Sucrose if 150 ml of a 1.2 M solution of Sucrose is diluted to a total volume of 0.60 L?

32. chemistry

A student needs to make a dilution from a stock solution. The stock solution is 2.) M NaCl. How much should the student use of the 2.0 M NaCl to make 1.0 L of 0.05M NaCl diluted stock.

33. Statistics

Find the sample proportions and test statistic for equal proportions. Is the decision close? Find the p-value. a. Dissatisfied workers in two companies: x1 = 40, n1 = 100, x2 = 30, n2 = 100, á = .05, two tailed test. b. Rooms rented at least a week in

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35. math

The students at Millerville High School were surveyed about their favorites type of music. The results are in the table. to the nearest whole percent, what percent of the students who chose country as their favorite are in 9th grade?

36. psychology

Can someone please help me with this psychology question asap? Describe how you might design a community health campaign. In your description, consider both risky behaviors and health promoting behaviors. I really need help with this. Thanks!

37. chemistry

How would you make a 1.0 L of 0.10M NaOH solution of 10.0M NaOH?

38. algebra

8/5 * -8/7)= how do you solve? multiply 8*8=64 and 5*7?

39. Calculus

How would i start this problem? The amount that workers contribute monthly for health care insurance premiums can be modeled by A(t)=0.07t^3-3.1t^2 + 54.3t-230, where A is the monthly amount contributed and t is the number of years after 1980. Find the

40. Science

What factors might cause my contribution of carbon dioxide emissions to deviate substantially from the US national average of approximately 20 tons? I used CO2 emissions from electricity, natural gas, my car, waste (& reducing by recycling), and taking a

41. Word Problem

Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. The firm examined 35 randomly chosen fax transmissions

42. geometry

The Rainforest Pyramid has a height of 10 stories (approximately 10 feet per story) , and the Aquarium Pyramid has a height of 12 stories. If the base areas of the pyramids are equal, how many times bigger is the volume of the Aquarium Pyramid than of the

43. I don't get what you wrotegeometry

A solid die used for some games is made up of two square pyramids put together sharing a common base. a) How many faces does the die have? b) How many edges does the die have? c) How many vertices does the die have? Thank you so much!!!!!!!!

44. math

Riley invests \$100 in the year 2000. The account is compounded annually. The account earns 3% interest for a period of 30 years. After 30 years, how much money will be in the account?

45. math

In week 1 80 people attended a basketball game. In week 2, 120 people attend a basketball game. By what percent did the attendance increased from week 1 to week 2. f.15%,g.33%,h.50%,j.67% 120-80=40 ????

46. Simple Interest

The Johnsons have saved \$45,000. They invest their money in a bank and thei account earns 7.5% interest. How many years will it take to earn \$74,000? *PLEASE PROVIDE AN EXPLANATION*

47. psychology

Describe how you might design a community health campaign. In your description, consider both risky behaviors and health promoting behaviors. I really need help with this. Thanks!

48. Algebra

y = -4 find the y coordinates of the points (-1) (2) and (-3)

49. Math

What operation is used to change a fraction in simplest form to an equivalent fraction? What operation is used to change a fraction to simplest form?

50. statistics

In the July 29, 2001, issue of The Journal News (Hamilton, Ohio) Lynn Elber of the Associated Press reported on a study conducted by the Kaiser Family Foundation regarding parents’ use of television set V-chips for controlling their children’s TV

51. algebra I

determine which real number corresponds to the situation. The record high temperature for a date is 97.9 degrees above 0. what is the corresponding number for this sentence?

52. Micro Econ

Historically, officials from 15 NE colleges with selective admissions policies and high tuition met each spring to compare financial aid packages for more than 10,000 common applicants. These meetings were designed to eliminate any differences in the

53. Math

Factor the following completely x^4 – 625

54. math

Solve each equation xˉ² = 4

55. Math

Problem solving with derivatives. Question: The sum of 2 numbers is 12. If one number is x, the value of x for which the product of the two numbers is a maximum is?

56. check my work geometry volume

Find the missing measure for each pyramid 1) area of base = 1,470 cm^2 volume= 22,050 cm^3 what is the height?______ I got 15cm^2 2) height = 26 feet volume= 11,466 ft^3 what is the area of the base?_____ I got 441 ft^2 Thank you!

Laura is standing 9ft away from a light pole. her shadow is 6ft long. If Laura is 5ft tall, which is closest to the height of the light pole 14.8???

58. Math

Ryan has a collection of220 baseball cards.helets his bro have 1/4 of his collection & sells 20% of the coll to the baseball card shop. he takes 15 cards to school to give his fireds how many baseball cards remain in ryan coll? 1/4=55 to school=15

59. science

if the ball that was thrown to a fried has a mass of 0.15kg and it accelerates at 20m/s, what force did you exert on the ball?

60. math

Find the value(s) of x for the following. (Enter your answers as a comma-separated list.) f(x) = 6 sin^2 x − 6 cos x, and the interval is 0 is less than or equal to x and x is less than or equal to pi. (a) f(x) has a local maximum or local minimum. local

61. computer science

Write a declarations and input statements necessary to read each of the following sets of data values into variables of the appropriate types. You choose the names of the variables. In some cases, punctuation marks or special symbol must be skipped. a. 100

62. nurse entrance test

After deducting 16 and 2/3 percent the price of a blouse is \$35.00. The list price is what? Is it 42.00 for the list price?

63. chemistry

Calculate the molarity of a solution by dissolving 40.0 g NaOH in 1.5 L solution.

64. statistics

how to do histogram and relative- frequency histogram using the #s 1,5,5,6,7,4,8,7,6,5,5,6,7,6,6,5,8,9,9, 10,7,8,11,2,4,6,5,12,13,6,3,7,8,8,9,9,10,9,8,9 with five classes

65. Microeconomics

If a monopoly is producing at an output where its average total cost of production is minimized and equals \$50 per unit and marginal revenue equals \$60, is the monopoly producing at the profit-maximizing output level? Explain why or why not.

66. micro economics

Why are the firms in the perfectly competitve markets unable to control the prices of the goods that they produce?

67. Math

﴾ 3a^2b^3 ﴿^4__________ 5c^2

68. Math

(x + 3)(x^2 – 2x + 7)

69. Math

(3x^2 +5x) - (2x^2 – 3x +2)

70. Math

Find all real or imaginary solutions to each equation. Use the method of your choice. 3y² + 4v – 1 = 0

A square pyramid has a base side length of 40 cm and a height of 51 cm. What is its volume? v=a^2 h/3 is this correct? 40^2 x 51/3 = 27200 cm3 ????? thank you

72. geometry revised question

A men's basketball is about 24.3 centimeters in diameters , while the diameter of a women's basketball is about 23.4 centimeters. What is the ratio of the surface area of a men's basketball to the surface area of a women's basketball? Round to the nearest

73. MATH

The work crew for the talent show at the local high school includes these members: 2 freshmen,4sophomores,8juniors,6 seniors.If the sponsor randomly chooses 1 member of the work crew to announce the act & 1 member to control the lighting, what is the

-2.4/5 1/3 -2.4/5.333 =-0.45?????

75. Math

How do you explaint to a 2nd grader how to find 2/3 minus 1/4?

76. English

When starting your search for peer reviewed scholarly sources, which of the following types of databases is your best choice?

77. geometry

what is the area of a rectangle that's 15 feet long and 20 feet wide

78. english

How do I write 5 sentenses about the role of education in successful financial planning using a different verb tese in each sentence. Past,present, future, progressive, and perfect.

79. Math 350..help!

How would I start this? The amount that workers contribute monthly for health insurance premiums can be modeled by A(t)=0.07t^3-3.1t^2+54.3t-230, where A is the monthly amount contributed and t is the number of years after 1980. Find the instaneous rate of

80. Micro Econ

Historically, officials from 15 NE colleges with selective admissions policies and high tuition met each spring to compare financial aid packages for more than 10,000 common applicants. These meetings were designed to eliminate any differences in the

81. Statistic

Your company wants to conduct a salary survey for the position of Accounting Assistant II. The estimated salary range is \$4,500, the margin of error should be \$100 and the desired level of confidence is 95%. What is the optimal sample size for this salary

82. Statistics

From her firm’s computer telephone log, an executive found that the mean length of 64 telephone calls during July was 4.48 minutes with a standard deviation of 5.87 minutes. She vowed to make an effort to reduce the length of calls. The August phone log

83. Word Problem

A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations. (b) Calculate a p-value and interpret it.

84. math

5 3 ____ + ______= 2 x – 1 7X – 7 3

85. Math

Find the vertex and intercepts for each parabola. Sketch the graph. g(x)=x(2)+x-6

86. Algebra

Find the vertex and intercepts for each parabola. Sketch the graph. g(x) = x² + x - 6

87. Math

2y² - 3y – 6 = 0

88. math

ww-1(3w+6) - w-1(3) = w-1(w+2)

89. math

Simplify each complex fraction. Reduce each answer to lowest terms. ab + b² 4ab ______________ a + b 6a²b

90. health

what type of environmental restructuring would a doctor's office manager implement in an office to promote open communication?

91. Math - Calculus

A circular oil slick floats on the surface of still water. Its area is increasing at a rate of 10m^2/min. At what rate is the radius (r metres) increasing?

92. Algebra, substitution method

How can I do x+5y=10 -2x-6y=-8

93. algebra

(2^-4 . z^-3)^5 Help is it 2^20 . z^15

94. algebra

what is( 3^6 /y^-5) ^2 thanks..I think it is 3^12/y^-10

95. geometry,,thank you

A men's basketball team is about 24.3 centimeters in diameters , while the diameter of a women's basketball is about 23.4 centimeters. What is the ratio of the surface area of a men's basketball to the surface area of a women;s basketball? Round to the

96. geometry-volume

Find the missing measure for each pyramid 1) area of base = 1,470 cm^2 volume= 22,050 cm^3 what is the height?______ I got 15cm^2 2) height = 26 feet volume= 11,466 ft^3 what is the area of the base?_____ I got 441 ft^2 Thank you!

A banker is attempting to construct the world's largest cake. The cake is 12 meters square and 4 meters tall. How much surface area will the cake need to be iced (including botto

How much wood is needed to completely cover a 4 ft wide ramp that starts 8 ft from a 6 ft tall platform? The ramp will run 10 ft on the incline.d/6 8/10 10f/48=12 ft???

99. math

Laura is standing 9 ft away from a light pole, Her shadow is 6 ft long. If Laura is 5 ft tall, which is closest to the height of the light pole?