# Jackie

Popular questions and responses by Jackie
1. ## Calculus

A box (with no top) is to be constructed from a piece of cardboard of sides A and B by cutting out squares of length h from the corners and folding up the sides. Find the value of h that maximizes the volume of the box if A = 7 and B = 12

2. ## history

Which of the following statements about the Grange and Farmers' Alliance movements is most accurate?

3. ## Insurance

Of 500 employees of a firm 280 have a life insurance policy ,400 have a medical insurance cover and 200 participate in both programs. 1)what is the probability that a randomly selected employee will be a participant in at least one of the two programs ?

4. ## Physics

A brass rod 50.0 cm long expands 0.0734 cm when heated. Find the temperature change. Using the equation Change in temp=change in length/original length * coefficient of linear expansion for brass I am getting the following result: .0734 cm/(1.9x10^-5)(50

5. ## statistics

A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 440 seconds and a standard deviation of 60 seconds.

6. ## Math

The hourly operating cost of an airplane, which seats up to 405 passengers, is estimated to be \$5,500. If an airline charges each passenger a fare of \$100 per hour of flight, find the hourly profit P it earns operating the airplane as a function of the

7. ## math

ted Williams made deposits of 500.00 at the end of each year for eight years. the rat is 8% compounded annually. calculate the value of ted's annuity at the end of eight years

8. ## prealgebra

A barrel shaped like a cylinder is laid on its side and rolled up a ramp. The barrel has a circular base that is 0.9m in diameter. If the barrel turns 37 times in being rolled up the ramp, how long is the ramp? Use the value 3.14 for π . Round your answer

9. ## History

A late-nineteenth-century Republican would have been more likely than a late-nineteenth-century Democrat to support? states' rights. reduced federal activity. reform legislation. lowered expenditures. help???

10. ## chemistry

Determine the molar solubility (S) of Zn(CN)2 in a solution with a pH = 4.91. Ksp (Zn(CN)2) = 3.0 × 10-16; Ka (HCN) = 6.2 × 10-10.

11. ## trig

A bird at the top of a tree looks down at a field mouse with an angle of depression of 65 degrees. If the field mouse is 30 meters from the base of the tree, find the distance from which the field mouse to the bird's eyes. Round the answer to the nearest

12. ## Chemistry

Consider the reaction: 3Ba(s)+N2(g)--->Ba3N2(s) 1)How many moles of barium metal react to produce 0.190 mol of barium nitride? 2)How many moles of nitrogen gas react?

13. ## fundamentals math

a box contains the following mixture of colored marbles 2 black, 3 red, 5 yellow, and 2 green. If two marbles are drawn, the second being drawn n after the first is replaced, then what is the probability that both are black?

14. ## History

Which author's book on the link between naval might and international power influenced leading statesmen both in the United States and abroad? A) Chester Nimitz B) Oliver Hazard Perry C) Alfred Thayer Mahan D) Josiah Strong

15. ## Algebra 1

How many two-digit numbers have a tens digit that is greater than the units digit? Explain.

16. ## Math

A deck from a card game is made up of about 108 cards. Twenty-five of them are red, yellow, blue, and green, and eight are wild cards. Each player is randomly dealt a seven-card hand. Write the final answer as a decimal rounded to six decimal places. 1.)

17. ## Algebra 2

Log² x + log² 3 = 1

18. ## AP physics

Vector A has a magnitude of 8.00 units and makes an angle of 45.0° with the positive x-axis. Vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods, find (a) the vector sum A + B and (b) the vector

19. ## math

A culture of bacteria grows exponentially. It doubles in size every 16 hours. How long will it take to triple from its original size?

20. ## programming

how do I write a pseudocode to find and display the largest list of positive numbers entered by the user. The user should indicate that he/she has finished entering numbers by enter a

21. ## Statistics

Suppose x is a uniform random variable with c = 40 and d = 50. Find the probability that a randomly selected observation exceeds 46

22. ## Math

A kite is 32m above from the ground. The angle the kite string makes with the ground is 39°. How long is the kite string, to the nearest metre?

23. ## Chemistry

In 6.20 h a 100 g sample of ag 112 decays to 25 grams. what is the half life of ag 112. I think the answer is 3.10 but I'm not sure. Thanks in advance =)

24. ## algebra

A reduced fat cookie contains 9g of fat per sereving. In order for food to be termed' reduced fat' it must have at least 25% less fat than the regular item. What can you conclude about how much fat is in a serving of the regular cookie? How much fat does a

25. ## geometry

The measure of the angle’s supplement is 50 degree more than five times that of its complement. Find the measure of the angle described.

26. ## Calculus and Vectors

The magnetic force (Vector FM)on a particle in a magnetic field is found by Vector FM = Vector I × Vector B, Vector I is the charge multiplied by the velocity of a charged particle and Vector B the strength of the magnetic field, in Tesla (T). An electron

27. ## Algebra

The floor of a rectangular room will be tiled with square tiles that measure 3 inches on each side. The room is 109 inches long and 103 inches wide. How many tiles, including parts of tiles, are needed to complete the job? A. 1,248 tiles B. 1,247 tiles C.

28. ## physics

Two people, one twice as massive as the other, try to play tug of war on a nearly frictionless, level, icy surface. When they begin to tug, they are 12 m apart. They tug by pulling the rope hand over hand, until their hands meet along the rope. How far

29. ## chemistry

Ignoring activities, determine the molar solubility of copper (I) azide (CuN3) in a solution with a pH of 10.83. Ksp (CuN3) = 4.9 × 10–9; Ka (HN3) = 2.2 × 10–5.

30. ## English

I am reading an article about Britney Spears leaving the X-Factor. On of the lines says "she wasn't a great judge, but she didn't shave her hair off or anything, so she proved herself capable of keeping together." I feel like this might be a logical

31. ## Physics

a carton of eggs sits on the horizontal seat of a car as the car rounds a 26 meter radius bend at 16.5m/s. what is the minimum coefficient of friction that must exist between the carton and the seat if the eggs are not to slip?

32. ## Personal Finance

The financial planning process concludes with efforts to: A. review and revise your actions. B. create a financial plan of action. C. analyze your current personal and financial situation. D. review the financial plan. I believe its A

33. ## Math

Lake Michigan Credit Union finances auto loans for its members. Each loan can be classified into one of four categories: paid in full, good standing, poor standing (with one or more missing payments), and delinquent (where the debt is sold to a collection

34. ## chemistry

Consider a solution made by mixing 500.0 mL of 0.04182 M Na2HAsO4 with 500.0 mL of 0.03645 M NaOH. Complete the mass balance expressions below for Na and arsenate species in the final solution. There are 4 arsenate species, but I only got three of them. I

35. ## Statistics

The estimated standard error, sM, provides a measure of the average or standard distance between _____. a score and the population mean (X and ì) a sample mean and the population mean (M and ì) a score and the sample mean (X and M) None of the other

36. ## math

You borrow \$90 from Grandma. You pay back \$15 a week. Write an equation in standard form that represents the amount owed(y) after x weeks.

37. ## chemistry

If the system below is at equilibrium in a closed vessel and a small amount of nitrous acid [HNO2(§¤)] is added, what would be expected to happen? HN3(§¤) + 2 H2O(§¤) + heat N2H4(§¤) + HNO2(§¤) hydrazoic hydrazine nitrous acid acid

38. ## Calculus and Vectors

Determine the value of k so that the line with parametric equations x = 2 + 3t, y = -2 + 5t, z = kt is parallel to the plane with equation 4x + 3y – 3z -12 = 0. I got the cross product of (2,-2,0) and (4,3,-3) which is (6,6,14), but that's not adding up

The floor of a rectangular room will be tiled with square tiles that measure 3 inches on each side. The room is 109 inches long and 103 inches wide. How many tiles, including parts of tiles, are needed to complete the job? A. 1,248 tiles B. 1,247 tiles C.

40. ## History

Who owned the company that controlled over 90% of the nation's oil refining industry? Andrew Carnegie Jay Gould John D. Rockefeller Alexander Graham Bell

41. ## Math

The annual precipitation for one city is normally distributed with a mean of 329 inches and a standard deviation of 2.6 inches. Find the probability that a randomly selected year will have more than 323.8 inches of rain. Express the probability as a

42. ## Mathematics

A local television station sent out questionnaires to determine if viewers would rather see a documentary, an interview show, or reruns of a game show. There were 700 responses with the following results: 210 were interested in an interview show and a

43. ## Algebra 1

Mr. Keskin and his wife have a cell phone plan that charges them \$5 for 200 text messages per month for each of their phones. The Keskins are charged an additional \$0.12 for each text message over their 200-text-message limit. Their carrier has offered

44. ## Algebra 2

9x²+4y²-18x+16y-11=0

45. ## Geometry

Guy wires 80 feet long support a 65 foot tall telephone pole. To the nearest degree, what angle will the wires make with the ground?

46. ## geometry

Find the point that is one-fourth of the way from (2,4) to (10,8).

47. ## Stat BHS 201

find the z- score location of a vertical line that spearates a normal distribution as described in each of the following. a. 20% in the tail on the left b 40% in the tail on the right c 75% in the body on the left d. 99% in the body on the right

48. ## Math

Experience shows that a ski lodge will be full ( 156 guests) if there is a heavy snow fall in December, while only partially full ( 57 guests) with a light snow fall. What is the expected number of guests if the probability for a heavy snow fall is .40? If

49. ## math

when are annuity due payments made

50. ## Chemistry

Write a balanced equation from the following statement: Zinc metal and sulfuric acid are combined to form hydrogen gas and zinc sulfate (Enter the formulas in the order they are listed. Do not leave a space between the coefficient and the formula)

51. ## math

At a certain time of day, a pole, 5 meters tall, casts a 3 meter shadow. The shadow of the building beside the pole is 18 meters long. How tall is the building? How long will the shadow of a 45 meter building be?

52. ## geometry

Suppose BD−→− bisects ∠ABC. If m∠ABD=12x+24 and m∠DBC=20x+16, what is m∠ABC?

53. ## History

The majority of the "new immigrants" of the late-19th century came from?

54. ## math

During a department store sale 30 shoppers bought only clothing. 5 shoppers bought only towels, and 15 shoppers thought both clothing and towels. If 100 people shopped that day and a shopper is chosen at random, what is the probability that the shopper has

55. ## personal finance

Which of the following is a true statement? A. The dividends-earnings ratio is a key factor that serious investors use to evaluate stock investments. B. The price-earnings ratio for a corporation must be studied for one period only. C. The price-earnings

56. ## english

John was late to dinner and I was late to the movies. simple complex compound compound-complex

57. ## Psychology

In terms of the general adaptation syndrome, the body prepares for a long, drawn-out battle during the _______ stage.

58. ## Chem 130

When calcium carbonate is heated strongly, carbon dioxide gas is released. CaCO3(s) CaO(s) + CO2(g) What volume of CO2(g), measured at STP, is produced if 14.1 g of CaCO3(s) is heated?

59. ## Math

Value Rent-a-Car rents a luxury car at a daily rate of \$37.01 plus 10 cents a mile. A business person is allotted \$100 for car rental each day. How many miles can the business person travel on the \$100? _______miles

60. ## accounting

using the break-even equations to solve for price and variable cost per unit andromeda company's break-even point is 2,400 units. variable cost per unit is \$42; total costs are 67,200 per year. what price does andromeda charge?

61. ## Chemistry

Consider this equilibrium process at 686°C. CO2(g) + H2(g) CO(g) + H2O(g) The equilibrium concentrations of the reacting species are [CO] = 0.050 M, [H2] = 0.045 M, [CO2] = 0.086 M, and [H2O] = 0.040 M. (a) Calculate Kc for the reaction at 686°C. (b) If

62. ## Personal Dimensions of Education

Select the sentence that is punctuated correctly 1 The neighors' new dog is small, quiet, and sky. 2 The neighbors' new dog is small quiet and shy. 3 The neighbors' new dog is, small quiet and shy

63. ## Math/Trig

An airplane leaves an airport and flies due west 150 miles and then 170 miles in the direction 210°50'. Assuming the Earth is flat, how far is the plane from the airport at this time (to the nearest mile)

64. ## AP US history

By violating the Navigation Acts and developing their own trading patterns, were the American colonies also creating their own mercantile system?

65. ## algebra

Jeremy is building a deck for the community center. The deck is shaped as rectangle. The width of the deck is 29ft. The perimeter of the deck is to be at least 134ft. Write an inequality that represents all possible values of the length of the deck. Find

66. ## statistics

1. How do the 3rd grade boys’ weight in Principal Ben’s school compare to the national average (mean weight = 90, sd =15)? Provide the IV, DV, and best method of analysis

67. ## finance

how do we end up with salvage value if the item is depreciated the cost of the item either over a period of years or all in one year? How does salvage value work?

68. ## Physics Equations of Motion

Along a straight road through town, there are three speed-limit signs. They occur in the following order: 66 , 31 , and 19 mi/h, with the 31 -mi/h sign located midway between the other two. Obeying these speed limits, the smallest possible time tA that a

69. ## Calculus AP

i wanna KNOW IF im DOING RIGHT. Evaluate the difference quotient for the given function. Simplify your answer. f(x)=x+3/x+1, [f(x)-f(1)]/(x-1) simplify my answer: [(x+3)/(x+1) - (1+3)/(1+1)]/(x-1) = [x+3/x+1 - 4/2] / (x-1) = [2(x+3)-4(x+1)/2(x+1)] / (x-1)

70. ## physics

A horizontal circular platform (m = 108.1 kg, r = 3.25m) rotates about a frictionless vertical axle. A student (m = 85.3kg) walks slowly from the rim of the platform toward the center. The angular velocity, omega, of the system is 2.5 rad/s when the

71. ## Stats

When sampling is done for the proportion of defective items in a large shipment, where the population proportion is 0.18 and the sample size is 200, what is the probability that the sample proportion will be at least 0.20

72. ## physics

Can someone please help me solve this: An 7.74g bullet is fired into a 320g block that is initially at rest at the edge of a frictionless table of height h = 1.07 m The bullet remains in the block, and after the impact the block lands d = 2.07 m from the

73. ## C Programming

I need help creating a program that uses a menu with options to enter student information (name, ID, GPA), print student information, or quit the program. Use data files and FILE pointers to store and print information entered.

74. ## Algebra

Write the slope-intercept equation for the line that passes through (-3,-15)and is perpendicular to -6x+8y=3

75. ## math

Show that Sn is non-abelian for n>=3

76. ## College Abstract Algebra

If H is a subgroup of G and K is a normal subgroup of G,prove that HK = KH

77. ## Algebra

a 260 m wire is cut into 3 pieces. The second is 4 times longer than the 1st. The third is 2 times longer than the 2nd how long is each piece=

78. ## Precal

Find the exact value of the expression. sin(arccos sqrt(5)/5)

79. ## statistics

A simple random sample of size n = 300 is obtained from a population whose size is and whose population size is n=20,000 ans whose proportion with a specified characteristic is p=0.8. Describe the sampling distribution of P^. A) Approximately normal; ìp =

80. ## chemistry

why is hydrogen bonding only possible with hydrogen?

81. ## math

A supplier provides parts to a manufacturing company that demands JIT deliveries. At the present time it takes 6 hours to make a round-trip between the supplier's warehouse and the customer, including loading, travel and unloading time. The lot size is 12

82. ## geometry

You have a slice of pizza with a central angle that measures 140° that you want to share with your friend. She cuts it through the vertex into two slices. You choose one slice that measures 60°. How many degrees are in the other slice?

83. ## algebra

The base of a triangle is 3cm grater than the height. The area is 14cm^2. Find the height and length of the base. Please show how you dervied at your answer.

84. ## algebra

The base of a triangle is 3cm grater than the height. The area is 14cm^2. Find the height and length of the base. Please show how you dervied at your answer.

85. ## algebra

The width of a rectangle is fixed at 30cm. What lengths will make the perimeter grater than 82cm.?

86. ## algebra

Soybean meal is 12% protein: cornmeal is 6% protein. How many pounds of each should be mixed together in order to get 240-lb. mixture that is 8% protein?

87. ## Algebra

Find the indicated outputs for f(x)= 5 x(2) - 4x. F(0)= f(-1)= f(2)=

88. ## health

A 67 year old man is diagnosed with cancer subsequently undergoes chemotherapy. As an excpected side affect of chemotherapy, his bone marrow stops functioning. What ia a potential consequence of this loss of function? A. his calcium levels will decrease.

89. ## physics

piston 1 has a diameter of 0.25 in; pistol 2 has a diameter of 1.5 in. In the absence of friction, determine the force necessary to support the 500 lb weight.

90. ## ila

In the sentence: What is the formula for the area of a parralellogram, Alicia? how is the word 'Alicia' used in the sentence?

91. ## Chemistry

How much heat (in kilojoules) is released on reaction of 4.10 g of Al? Reaction: 2Al(s) + 3Cl2(g)--->2AlCl3(s) Delta H= -1408.4 KJ

92. ## Brooke High School

Two dice are rolled. What are the odds in favor of a sum less than 5?

93. ## Algebra - how do you do this

(-7yt)/(3x)=?/(18xyt) Building up the denominator Build each rational expression into an equivalent rational expression with the indicated denominator.

94. ## Critical thiinking

(1) It is an article of faith among some economists that the significant inventions of the contemporary world are the results of the innovative genius of big business organizations. (2) Yet in the United States, the current trend toward corporate mergers

95. ## math

6. Suppose demand and supply are given by Qd = 60 - P and Qs = P - 20. a. What are the equilibrium quantity and price in this market? (4 points) I know we make them : 60 - P = P - 20 now Im stuck

96. ## Calculus and Vectors

Show a graphical method of approximating the instantaneous rate of change at x = 3 for the function ƒ(x) = -x2 + 4x + 1 using secants. Show two graphical approximations. I had the same question but instructed to find it using a numerical method. No

97. ## Pre-Calc

The wattage rating of an appliance W varies jointly as the square of the current I and the resistance R. If the wattage is 1.5 watts when the current is 0.1 ampere and the resistance is 150 ohms, find the wattage when the current is 0.3 ampere and the

98. ## Physics

1) Seagulls are often observed dropping clams and other shellfish from a height to the rocks below, as a mean of opening the shells. If a seagull drops a shell from rest at a height of 14 m, how fast is the shell moving when it hits the rocks?