# AJ

Newest questions and responses by AJ
1. ## algebra

there is a cylinder perfume bottle the height is 12.4 cm the radius is 6.2 cm the formula is v= h * 3.14 * r squared

2. ## Math

Express the product (1−1/2^2)(1−1/3^2)(1−1/4^2)···(1−1/21^2) as a fraction a/b, where a and b are relatively prime positive integers.

3. ## analytic geometry

A parabola y=ax^2+bx+c has vertex (4,3). If (3,0) is on the parabola, find a.

4. ## Math

Evaluate sqrt of (2003)(2005)(2007)(2009)+16 by using algebraic method.

5. ## Combinations

Five members from a group of 6 girls and 5 boys are chosen. How many five-member teams are there that include more than two boys?

6. ## Maths

Write an equation of the line that passes through (-5,-1) and is parallel to the line y=-3x+6

7. ## geometry

1)The Arthur Ravenel Jr. Bridge is the longest cable-stayed bridge in the United States. The bridge has a total length of 13200 feet. Each year, the Cooper River Bridge 5K Run is held in the Spring. If there are approximately 16404 feet in 5 kilometers,

8. ## calculus

The equation x^2+4y^2=100 describes an ellipse. First, use implicit differentiation to find its slope at the points (8,3) and (8, -3). Then, solve the equation for y, obtaining two functions and differentiate both to find the slopes at x = 8. Do your

9. ## Probability

In how many ways can 7 people be lined up in a row for a picture if two of them should have at least 2 people between them?

10. ## math

A rich uncle wants to make you a millionaire. How much money must he deposit in a trust fund paying 8% compounded quarterly at the time of your birth to yield \$1,000,000 when you retire at age 59?

11. ## Economics

Suppose that when disposable income rises from \$5.2 trillion to \$6.0 trillion, consumption rises from \$5.0 trillion to \$5.6 trillion. What is the marginal propensity to consume?

12. ## calculus

Find the value of \$800 deposited in a bank at 10% interest for 8 years compounded in the following ways. (Round your answers to the nearest cent.) (a) annually_________\$ (b) quarterly_________\$ (c) continuously________\$

13. ## calculus

The reproduction function for a sardine is f(p) = −0.0004p^2+3p, where p and f(p) are in hundred metric tons. Find the population that gives the maximum sustainable yield, and the size of the yield. population=_________ hundred metric tons size of

14. ## calculus

Marine ecologists estimate the reproduction curve for swordfish in a fishing ground to be f(p) = −0.01p^2 + 8p, where p and f(p) are in hundreds. Find the population that gives the maximum sustainable yield, and the size of the yield.

15. ## calculs

A page of 150 square inches is to have margins of 1 inch on either side and 1 1/2 inches at the top and bottom, as in the diagram. Find the dimensions of the page that maximize the print area.

16. ## Probability

Four distinct fair of dice are rolled. What is the probability that the sum of the resulting numbers is at least 23?

17. ## Math

30-second oral question The expression 9(2018^2)+20180+4040 is a square of what positive integer?

18. ## Analytic Geometry

The midpoint of P(1,2) and A is Q; the midpoint of P and C is S; the midpoint of Q and S is R(5,1.5). Find the coordinates of B, the midpoint of A and C.

19. ## Algebra

Jack and Jill regularly run around an 800-meter track, but Jack runs 2 m/s faster. If they start from the same point on this track, and run in the same direction, Jack will eventually pass Jill in 6 minutes and 40 seconds. What is Jill's speed?

20. ## Maths

17. Atlanta, Georgia, receives an average of 27 inches of precipitation per year, and there has been 9 inches so far this year. How many more inches, p, of precipitation can Atlanta get and to stay at or below the average? (1 point) p + 9 > 27; p > 18 9 +

21. ## Math

True or False. 1. Every function is a relation. 2. When you switch the inputs and outputs of any function, the resulting relation is a function.

22. ## Algebra

1. -9p-17=10 Will someone help me figure out the answer and show me the process?

23. ## Math

You are making cookies. One recipe calls for 4 cups of chocolate morsels for 3 batches of cookies.. A second recipe calls for 5 cups of chocolate morsels for 4 batches of cookies. Which cookies will contain more chocolate morsels?

24. ## Math

An important business executive in Italy was caught speeding in northern Italy. He was testing his brand new Porsche sports car. He was clocked at 311 kilometers an hour and fined 347 Euros. If a kilometer is .625 of a mile and a Euro was worth \$1.25 at

25. ## Social Sciences-Social Anthropology

Hi Please help me I am confused Am I a homo sapiens? or a homo sapiens sapiens? thank you so much.

26. ## Math

If 1 pound, 12 ounces of fish cost \$2.24, what is the cost of the fish per pound?

27. ## Math

A square measure 9 feet on a side. If each side of the square is increased by 3 feet, how many square feet are added to the area? What are the steps in solving this math equation?

28. ## Physical Science

Describe/draw the process and steps of an electron emitting light.

29. ## Chemistry

Calculate the pH of 175.0 mL of H2O following the addition of 0.57 mL of 1.39 M NaOH

30. ## Physics

a) The recommended daily allowance (RDA) of the trace metal magnesium is 410 mg/day for males. Express this quantity in ?g/s. Express this quantity in b) For adults, the RDA of the amino acid lysine is 12 mg per kg of body weight. How many grams per day

31. ## Chemistry

Given H2(g) + (1/2)O2(g) ---> H2O(l), dH = -286 kJ/mol, determine the standard enthalpy change for the reaction 2h2O(l) ---> 2H2(g) + O2(g) 2H2O(l) ---> 2H2(g) + O2(g) H2(g) + (1/2) O29g) ---> H2O (l) : dH = -286 kJ/mols 2H2O(l) ---> 2H2(g) + 2O2(g) :

32. ## Chemistry

Write the balanced chemical reaction (showing appropriate symbols and states) for the chemical reaction with enthalpy change equal to and defined by the quantity dHformation [NH3(g)] N2(g) + 3H2(g) --> 2NH3(g) Is that all the question is asking for?

33. ## Chemistry

When .560 g of Na(s) reacts with excess F2(g) to form NaF(s), 13.8 kJ of heat is evolved at standard-state conditions. What is the standard enthalpy of formation of NaF(s)? Start off by balancing the equation: 2Na(s) + F2(s) ---> 2NaF(s) Then make it for

34. ## Chemistry

The enthalpy of formation for a substance corresponds to the enthalpy change for a reaction. Write the specific chemical reaction defining the enthalpy of formation of butane: Just checking to make sure this is correct: 4C + 5H2 ---> C4H10

35. ## discrete math

A bubble sort begins with the array: 372418 Work through the lists obtained at each step of the bubble sort. Complete the table below for the intermediate step where 7 is at position four in the array. [][][]7[][]

36. ## Math

my divisor is 5 I'm greater than 4 X 5 I'm less than 5 x 5 my remainder is 1 what dividend am I

37. ## Maths

There are 150 mangoes in basket p and basket q. 1/4 of the mangoes in basket p were yellow and the rest were green. 3/5 of the mangoes in basket q were yellow and the rest green. The number of green mangoes in both baskets were equal. How many yellow

38. ## Maths

There are 150 mangoes in basket p and basket q. 1/4 of the mangoes in basket p were yellow and the rest were green. 3/5 of the mangoes in basket q were yellow and the rest green. The number of green mangoes in both baskets were equal. How many yellow

39. ## Algebra

Translate into a variable expression. Then simplify the expression. Twice the sum of four times a number n and thirty. Can you explain how to write it as a variable expression pls Also what does "and" stand for here?

40. ## Geometry

Problem: ABCDE\$\ is an equilateral pentagon with side length 2 in which angle B= angle E=120 degrees. The area of ABCDE can be expressed in the form square root of x + square root of y for some integers x and y. Find x+y. I don't understand. I really need

41. ## Math

A soccer field has a perimeter of 26 yards.if the width is 8 yards,how long is the length?

42. ## PsyDAG How can i inteview you?

remember that statistics assignment of ours? pleaseee

43. ## Statisticians Interview only

Hello are you a statistician? may I interview you? Thank you

44. ## Math Slope

Jose the plumber charges \$65 per hour to fix your plumbing. He uses the equation C=65H+100 to determine the charge of his services, C, after working h hours. What is the Y intercept? What does it represent in the context of the problem.

45. ## Math

A printer takes 5mins to print 90 copies of a repor. At this rate, how many copies of the same report can it print in 1/2 hours

46. ## algebra

The sum of two numbers is 100. Such that the first number is twice as large as the second number, when the second number is subtracted by 1.

47. ## Math

A running track consists of two straight sections with semi-circular ends. If the straight sections measure 100 metres and one compete lap on the inside of the track measures 1/2 k, what is the distance x between the two straights?

48. ## Calculus

What is the maximum area of a rectangle that has sides along the positive x-axis and y-axis and lies below the line 3x+2y=1

49. ## Algebra

Rene used a \$4 off coupon to buy bows which cost \$2 each. Write an inequality rene could use to determine the number of bows she can buy if she plans to spen more that \$8. Then graph the solution set

50. ## Chemistry

What mass of ammonium chloride must be decomposed to prepare 134 grams of ammonia (NH3). Hydrochloric acid will also be produced.

51. ## Geography

which demographic group is correctly matched with its issue A.religious people - farm subsidies B.midwesterners - farm subsidies C.single parents - affirnmative action D.all are matched correctly

52. ## College- US History

How has popular culture reinforced Cowboys of the West?

53. ## Math

Prove that cot²A(secA-1) = Cos A

54. ## Finance

****HELP PLEASE**** Given the following information, answer the following: TR=\$3Q TC= \$1,200 = \$2Q 1. what is the break-even level of output? 2. If the firms sells 1,300 units, what are its earnings or losses? 3. If sales rise to 2,000 units, what are the

55. ## Maths

In a box of markers there are eight which have dried up and will not write. The box contains 15 red, 15 purple, 5 black and 10 white markers. A marker is picked at random from the box. Find the probability that a) it is red b) it is not black c) it is

56. ## Maths

The sum of two digits number is 7. In changing position of digits we get the number 9 less than the original number. What is number?

57. ## PHYSICS

If there is no dark matter, in order to explain our observations, our concepts of an important building block of the universe have to be incorrect. What is that building block and why do Astronomers overwhelmingly favor dark matter, which they cannot see,

58. ## Physics / Astronomy

If there is no dark matter, in order to explain our observations, our concepts of an important building block of the universe have to be incorrect. What is that building block and why do Astronomers overwhelmingly favor dark matter, which they cannot see,

59. ## math

how do I find how many times greater ? 9x10 to the 8 power is how many times greater than 3x10 to the 7 power?

60. ## maths

riposting this. the answer kindly supplied by Steve is beyond my understanding. all i want to know please is how long will the shadow be cast on the ground by a 3m tall vertical fence with the sun behind it as follows: THIS IS NOTHING TO DO WITH A LADDER A

61. ## maths

THIS IS NOTHING TO DO WITH A LADDER A fence 3m tall is erected vertically and parallel to a building that is 10m away please can someone tell me the maximum length of the shadow the fence will cast on the ground - thank you

62. ## maths

a fence 2m tall and 5m from a parallel building - what length is the shadow from the fence and how is this worked out?

63. ## Math

find the sum of 2 1/2 and 2/5

64. ## Math

2/3>3/ number that makes the statement true.. I am confused

65. ## Social Studies

What was the main purpose of the settlers who established Jamestown? a.to trap animals and sell furs b.to find gold and silver c.to farm tobacco d.to collect sweetgrass for baskets Would it be B? I am thinking B,or C.

66. ## Math

The local health club is advertising a special for new members: no initiation fee to join and lnly \$34.50 per month for the first year. If Andy joins the health club for one year, how much will he spend on membership?

67. ## Algebra

The time, t, required to drive a certain distance varies inversely with the speed, r. If it takes 12 hours to drive the distance at 60 miles per hour, how long will it take to drive the same distance at 85 miles per hour? A. About 7.08 hours B. About 5.00

68. ## algebraic modeling

A toy manufacturer determines that the daily cost,C, for producing x units of a dump truck can b approximated by the function c(x)=0.005x^2-x+109 I got that the manufacturer must produce 100 units per day... What is the minimum daily cost?

69. ## math

Why Was the Engineer Driving the Train Backwards?

70. ## chemistry

What volume of 0.050 M AgNO3, silver nitrate solution is required to reat completely with 60.0 mL of 0.025 M K2S, potassium sulfide?

71. ## math -hw help

Determine whether the following regular tetrahedrons have an edge length that is a whole number, a rational number or irrational number. The surface are of a tetrahedron is given by the equation: SA = √ 3s^2 Surface are of regular tetrahedron A = 1.5

72. ## math (factors and products)

How could you use an area model to identify the binomial factors of a trinomial?

73. ## Math

How could you use an area model to identify the binomial factors of a trinomial?

74. ## physics

A soccer ball is kicked with an initial horizontal velocity of 16.5 m/s from a 92 meter high cliff. Determine the time it took the ball to reach the ground and how far the ball got from the edge of the cliff.

75. ## Algebra2

log2(x+8)-log2(5)=4

76. ## arithmetic

If you have 3 cups of pineapple juice and, how many total cups of punch can you make? Table: Ginger Ale - 40% OJ 25% Pineapple juice 20% Sorbet 15

77. ## Math

Write a word phrase for this algebraic expression. 6.5-h

78. ## Physics(Science)

Waves on a 5.0 m rope travel at a speed of 92 m/s. If the tension in the rope is 497 N, what is the mass of the rope?

79. ## elementary

Magic square 13.6

80. ## Physics

A dart is thrown horizontally with an initial speed of 14 m/s toward point P, the bull's-eye on a dart board. It hits at point Q on the rim, vertically below P, 0.19 s later. (a) What is the distance PQ? (b) How far away from the dart board is the dart

81. ## English

how do I start an Auto Biography? I mean what sentence should i start it with?

82. ## MATH HELP!!

SID WROTE 541,309 ON HIS PAPER. USING NUMBERS AND WORDS EXPLAIN HOW THE NUMBER WOULD CHANGE IF HE SWITCHED THE DIGITS IN THE HUNDRED THOUSANDS AND TENS PLACES

83. ## cOLLEGE mAJORS

ACCOUNTING VS IT WHICH IS HARDER? WHICH IS EASIER?

84. ## math

2^5/2 - 2^3/2

85. ## Physics

You are standing on a fish pond wishing to catch a fish. How would you aim your fish gun in order to catch a fish which your eyes could see 20 cm below the surface of water ? will u aim higher , lower or exactly on the location of the fish as seen by your

86. ## Grammar

Before the items that are complete sentences, write S. Before those that contain fragments, write F. Before a run on sentence, write RS. 1. We often walk through the woods, picking berries and listening to the birds. Is this a run on sentence?

87. ## math

how can i plot values in a parabola graph if the values are fractions. it's my first time with this things so i don't understand

88. ## Math

If I has plots of (3,2) and (8,6) how would I find the area in square units

89. ## Physics

A firefighter of mass 73 kg slides down a vertical pole with an acceleration of 5 m/s2. The acceleration of gravity is 10m/s2. What is the friction foce that acts on him? Answer in units of N

90. ## Spelling

Wordly wise 3000 book 7 lesson 7c vocab answers?

91. ## Science

Uranium-238 is less stable than oxygen-16. What accounts for this difference? (A) Uranium is a solid, while oxygen is a gas. (B) Unlike oxygen-16, uranium-238 has a nucleus in which repulsive electric forces surpass the strong nuclear forces. (C) Oxygen-16

92. ## Math

If sin(x) = 1/3 and sec(y) = 29/21 , where x and y lie between 0 and π/2, evaluate the expression using trigonometric identities. (Enter an exact answer.) cos(2y)

93. ## English

What type of clause or phrase is italicized in the sentence below? The play, a three-act farce, amused everyone.

94. ## math

Pat worked 43 hours and received \$7.25 per hour for regular pay and time-and-a-half for all hours over 40 hours. What were her weekly earnings?

95. ## physics

The drawing shows a uniform horizontal beam attached to a vertical wall by a frictionless hinge and supported from below at an angle θ = 38o by a brace that is attached to a pin. The beam has a weight of 346 N. Three additional forces keep the beam in

96. ## math

what is missing number for magic square for 22, 111,72, 131

97. ## algebra 1

Graph each rational function;identify the domain and ranges;and compare the graph with the graph y=1/x. 1.y=-10/x 2.y=1/(x+3)+3

98. ## algebra 1

Graph each rational function;identify the domain and ranges;and compare the graph with the graph y=1/x. 1.y=-10/x 2.y=1/(x+3)+3

99. ## calculus

the telephone company is planning to introduce two new types of executive communications systems that it hopes to sell to its largest commercial customers. It is estimated that if the first type of system is priced at x hundred dollars per system and the