# johnny

Popular questions and responses by johnny
1. ## calculus

let theta be an angle of quadrant IV such that sin theta = -8/9 find the exact value of sec theta and cot theta?

2. ## Mathematics

3/7 of the people who live in the apartment building are men. 5/8 of the remaining people are women. The rest are children. A total of 275 men and women live in building. How many people live in apartment building altogether?

3. ## History

Which accurately describe the involvement of the Catholic Church in the Crusades? A.)In the 13th century, the Church sanctioned the Children’s Crusade in which adolescents and teenagers set out from Europe to reclaim Jerusalem. B.)In 1208, the Church

4. ## Organich Chemistry

What effect will the following factors have on a chromatographic separation 1) too strong an absorbent 2)collection of large elution fractions

5. ## Math

The distance s in feet that a body falls in t seconds is given by the formula s=16t^2. If a body has been falling for 5 seconds, how far will it fall during the 6th second? Please show work/explain A. 16 ft. B. 80 ft. C. 176 ft. D. 400 ft. E. 576 ft.

6. ## Math

A triangle can have sides whose lengths are 9 cm, 16 cm, and A. 7cm B. 8cm C. 25cm D. 26cm

7. ## Math

At intermission, Xavier sold refreshments. Of the items he had, 1/5 were granola bars and 1/2 of the remaining items were containers of popcorn. The rest were divided equally among apples, rice cake, and containers of yogurt. Xavier sold the 8 apples he

8. ## Economics

At a management luncheon, two managers were overheard arguing about the following statement “A manager should never hire another worker if the new person causes diminishing returns”. Is this statement correct? If so, why? If not, explain why not.

9. ## CHemistry

Arrange the following compounds in order of decreasing ease of elution from a column of silica gel: a) 2-octanol; b) 1,3-dichlorobenzene; c) tert-butylcyclohexane; d) benzoic acid I was wondering if this was the correct order of it: Tert-butylcyclohexane >

10. ## Calculus and Vectors

THE VECTORS a - 5b AND a-b ARE PERPENDICULAR. IF a AND b ARE UNIT VECTORS, THEN DETERMINE a dot b

11. ## College physics

A 0.006 00-kg bullet traveling horizontally with a speed of 1.00 x 10^3 m/s enters an 20.1-kg door, imbedding itself 10.9 cm from the side opposite the hinges as in the figure below. The 1.00-m wide door is free to swing on its frictionless hinges. At what

12. ## geometry

Given: ΔАВС, m∠ACB = 90° CD⊥AB,m∠ACD =60° BC = 6 cm. Find: АD

13. ## Chemistry

How many grams are there in 2.3 x 10^24 atoms of silver? I need to use dimensional analysis, and I'm not sure of the conversions I'd need to solve this problem. Thank you!

14. ## physics

A 72 kg man drops to a concrete patio from a window only 0.60 m above the patio. He neglects to bend his knees on landing, taking 2.0 cm to stop. (a) What is his average acceleration from when his feet first touch the patio to when he stops? m/s2 (b) What

15. ## chemistry

Sixteen electrons are present in the Lewis structure of which of the following molecules? CO2 N2O SO2 more than one correct response no correct response If more than one correct response please show all correct answers thank

16. ## physics

A firefighter with a weight of 722 N slides down a vertical pole with an acceleration of 3.11 m/s2, directed downward. (a) What are the magnitude and direction of the vertical force (use up as the positive direction) exerted by the pole on the firefighter?

17. ## math

One phone plan charges a \$20 monthly fee and \$0.08 per minute on every phone call made. Another phone plan charges a \$12 monthly fee and \$0.12 per minute on each call. After how many minutes is the charge the same for both plans? A.60 minutes B.90 minutes

18. ## ACTIVITY-BASED COSTING

Globe Company produces two products, A1 and B2. A1 is a high-volume item totaling 20,000 units annually. B2 is a low-volume item totaling only 6,000 units per year. A1 requires one hour of direct labor for completion, while each unit of B2 requires 2

19. ## math

15. The sum of five unequal whole numbers is 90. The second largest of these five numbers can be at most A.19 B.41 C.43 D.89 please explain and show work.

20. ## stats

The probability is 0.7 that a person shopping at a certain store will spend less than \$20. For groups of size 13, find the mean number who spend less than \$20.

21. ## Economics

Engineers at a national research laboratory built a prototype automobile that could be driven 180 miles on a single gallon of unleaded gasoline. They estimated that in mass production the car would cost \$40,000 per unit to build. The engineers argued that

22. ## Physics

A crate sets on wooden horizontal surface (a wooden floor). The figure shows a top view of this looking down onto the crate (gravity would be acting into the page). Man one and man two apply forces F1 and F2, at angles of θ1 and θ2 respectively, with the

23. ## Chemistry

Been stumped on this problem for a day now. 2KClO3-->2KCl+3O2 a) If 53.0g of potassium chlorate breaks down, what volume of oxygen is produced? For this one I got: 14.6L O2 b) How many grams of potassium chloride are produced from problem a? For the life

24. ## math

5. There are x dictionaries in a bookstore. After 1/8 of them were purchased, 10 more dictionaries were shipped in bringing the total number of dictionaries to 52. What is the value of x?

Why is it that the reward for capital is interest? I don't get how the business is rewarded interest, isn't it the banks?

26. ## Financial Management 2-2

If an individual buys stock on margin and its price rises, the investor A. must put up additional collateral. B. must pay tax on the unrealized gain. C. must pay interest on the borrowed funds. D. may take delivery of the stock. I would think the answer is

27. ## chemistry

which of the following tetrahedral molecules is polar? please explain CH4 CF4 CH3F thanks

28. ## chemistry

in which of the following pairs of compounds are both members of the pair molecular compounds? PCl3 and LiBr CCl4 and KOH NaH and CaF2 more than one correct response no correct response if more than one response please show all the correct answers thanks

29. ## trig

Let be an angle in quadrant II such that sec(theta) -4/3 . Find the exact values of cot (theta) and sin (theta).

30. ## Macro economics

5. The problem of determining what goods and services society should produce: A.exists because we can produce more than we need or want. B.exists because there are not enough resources to provide all the goods and services that people want to purchase.

31. ## investing 2-2

If an individual buys stock on margin and its price rises, the investor A. must put up additional collateral. B. must pay tax on the unrealized gain. C. must pay interest on the borrowed funds. D. may take delivery of the stock. I think the answer is C

32. ## physics

In downhill speed skiing a skier is retarded by both the air drag force on the body and the kinetic frictional force on the skis. Suppose the slope angle is è = 37.5°, the snow is dry snow with a coefficient of kinetic friction ìk = 0.0400, the mass of

33. ## trigonometry

let 0 be an angle in quadrant IV such that cot0=-(8)/(9). Find the exact value of sin0 and sec0

34. ## Math

Solve for the unknown quantity in each proportion

35. ## Chemistry

Mg + 2HCl ----> MgCl2 + H2 What volume of hydrogen at STP is produced from the reaction of 50.0g of Mg and the equivalent if 75g of HCl? 1. What is the limiting reagent? 2. What is the volume of hydrogen produced? 3. How much is in excess?

36. ## Physics

A student drops a lead ball 4" in diameter from the top of a large live oak tree. As the ball is falling, a bird flies under it, slowing the ball's velocity to 30 feet/sec. Two seconds later the ball strikes the ground. What is the coefficient of friction

37. ## chemistry

is the reaction between Copper sulfate and zn exothermic or endothermic and does that involve the activity series?

38. ## Chemistry

In the following reaction, which substance is acting as the Brønsted-Lowry acid? NH3 + H2O NH4+ + OH

39. ## Algebra

Juan charges \$3.50 per hour for babysitting. Write a rule to describe the amount of money (M) earned is a function of the number of hours (h) spent baby-sitting. HELP PLEASE

40. ## Programming

Submit pseudocode and a flowchart for the following programming exercise: Fat Gram Calculator Design a program that asks for the number of fat grams and calories in a food item. Validate the input as follows: - Make sure the number of fat grams and

41. ## physics!

howdy, just cant seem to get this question, can anyone express this question in words i can get?! thanks A sound wave of wavelength 0.8 m divides into two equal parts that recombine to interfere constructively, with the original difference between their

42. ## math

In △ABC, CM is the median to AB and side BC is 12 cm long. There is a point P∈CM and a line AP intersecting BC at point Q. Find the lengths of segments CQ and BQ, if P is the midpoint of CM

43. ## chemistry

What mass of carbon dioxide can be produced from 4 moles of sodium bicarbonate according to the following unbalanced reaction, NaHCO3 --> Na2CO3 + CO2 + H2O?

44. ## physics

An airplane is travelling at a speed of 600 mph on a heading of 345 degrees. There is a wind moving at a speed of 70 mph on a heading of 20 degrees. The pilot would like to maintain his planned course. Find the speed and heading he should set in order to

45. ## math

6. If each of eight biology classrooms is in use for 5 hours and 15 minutes per day, and total of 84 student experiments are done, how long does each experiment take on average? A.20 minutes B.30 minutes C. 40 minutes D.50 minutes E.1 hour please show

46. ## chemistry

Which nucleophile, when reacted with 1-bromopropane (CH3CH2CH2Br), would produce an ether? I- OH- -OCH3 SH-

47. ## algebra can someone help my buddy ray out

identify the vertex and the axis of symmetry of the graph for the function y=3(x+2)^2 a.vertex(2,-3 axis of symmetry x=2 b.vertex(-2,-3) axis of symmetry x=-2 c.vertex(2,3) axis of symmetry x=2 d.vertex(-2,3) axis of symmetry x=-2 identify the maximum or

48. ## statistics2

A textbook publisher wants to determine process control charts for the textbook height. The following table shows the first 20 samples of n=4 sample size of the production of the text. Sample - X Bar - Range 1 - 10.01 - .01 2 - 9.97 - .04 3 - 9.98 - .03 4

49. ## physics

In an electric shaver, the blade moves back and forth over a distance of 2.0 mm. The motion is simple harmonic, with frequency 118 Hz. (a) Find the amplitude. mm (b) Find the maximum blade speed. m/s (c) Find the magnitude of the maximum blade

50. ## physics

A 72 kg man drops to a concrete patio from a window only 0.60 m above the patio. He neglects to bend his knees on landing, taking 2.0 cm to stop. (a) What is his average acceleration from when his feet first touch the patio to when he stops? m/s2 (b) What

51. ## physics

A mass M is split into two parts, m and M - m, which are then separated by a certain distance. What ratio m/M maximizes the magnitude of the gravitational force between the parts?

52. ## Geometry

Given: △ABC, ADEF rhombus D∈AB, E∈BC, F∈AC AB=14, BC=12, AC=10 Find: BE and EC

53. ## math

Mr. Angulo buys 5/8 pound of red grapes and 3/8 pound of green grapes. How many pounds of grapes did mr.angulo buy in all?

54. ## math

5. The sum of 7 unequal positive integers is 61. What is the largest possible value that any of those integers can have? A.55 B.40 C.39 D.13 E.9 please show work

55. ## math

When four times the number is added to 7 times the number, the result is 33, what is the number?

56. ## physics

12.8 kg of ice at 0 C is dropped into 3.3 kg of water at C. What fraction of the ice melts? =

57. ## Chemistry

Which nucleophile, when reacted with 1-bromopropane (CH3CH2CH2Br), would produce a thiol? OH- SH- I- -OCH3

58. ## chemistry

what is the correct name for k2o

59. ## chemistry

Which of the following statements concerning differences between ionic and molecular compounds is correct? Molecular compounds contains two elements, and ionic compounds contain three of more elements ionic compounds contain oxygen, and molecular compounds

60. ## math

Find the area of the following circle. r = 9 yd.

61. ## Physics

Which of the following is a direct result of the equation of continuity? a. The pressure one meter below the surface of water is about 10% greater than atmospheric pressure. b. The pressure on the inlet side of a horizontal pipe through which water is

62. ## stats

The Ledd Pipe Company has received a large shipment of pipes, and a quality control inspector wishes to estimate the average diameter of these pipes. A random sample of 18 pipes produces an average diameter of 2.56 mm with a standard deviation of 0.05 mm.

63. ## math

The playground at molly's school is in the shape of an equilateral triangle.The playground at david's school is in the shape of an acute triangle. could molly and david go to the same school? Explain.

64. ## chemistry

In the explosion of a hydrogen-filled balloon, 0.30g of hydrogen reacted with 2.4g of oxygen to form how many grams of water vapor? (Water vapor is the only product.)

65. ## AP physics

A water skier, moving at a speed of 8.61 m/s, is being pulled by a tow rope that makes an angle of 34.9 ° with respect to the velocity of the boat. The tow rope is parallel to the water. The skier is moving in the same direction as the boat. If the

66. ## Statisitcs

Scores on the verbal section of the SAT have a mean of 500 and a standard deviation of 100. If someone scored at the 90th percentile, what is their SAT score?

67. ## british lit.

mark syllables, separate feet with short vertical lines, and indicate the rhyme scheme

68. ## algebra

The sides of an rectangle was 5cm by 9cm. When both dimension were increased by an equal amounts the area of the rectangle increased by 120 cm^2 find the dimensions of the new rectangle.

69. ## Physics

An arrow is shot with a velocity of 30.0 meters/second and at an angle of 37 degrees above ground. Its initially 2 meters above ground and 15 meters from wall. Wat Height above grond does it hit wall?

70. ## physics

The figure below shows a "conical pendulum", in which the bob (the small object at the lower end of the cord) moves in a horizontal circle at constant speed. (The cord sweeps out a cone as the bob rotates.) The bob has a mass of 0.035 kg, the string has

71. ## PHYSICS HELPPPPP

A diver descends from a salvage ship to the ocean floor at a depth of 35 m below the surface. The density of ocean water is 1.025x10^3 kg/m^3. a) Calculate the guage pressure on the diver on the ocean floor. b) Calculate the absolute pressure on the diver

72. ## Algebra

Write an equation for the following, X intercept -4, y intercept -2

73. ## Physics

What is the change in entropy of steam 320g of steam at 100°C when it is condensed to water at 100°C?

74. ## math

In ΔABC,AD and BE are the angle bisectors of ∠A and ∠B and DE║ AB.If m∠ADE is with 34° smaller than m∠CAB,find the measures of the angles of ΔADE.

75. ## Chemistry

Hey bob- Here's what I got so far: 3AgNO3 + Na3PO4 ---> Ag3PO4 + 3NaNO3 Silver nitrate and sodium phosphate are reacted in equal amounts of 200. g each. How many grams of silver phosphate are produced? 1. What is the limiting? 2. How much silver phosphate

76. ## Social studies

Why was the mayflower compact so significant?

77. ## Chemistry

What's the formula for Li2Co3+Co(NO3)3(aq) ->

78. ## Literacy

1.Write the participle in the sentence. Why do you need a new pair of hiking boots? My answer - NEED 2.Write the first and last word of the participial phrase. My answer - BEGINNING 3.Write the first and last word of the participial phrase. Disappointed by

79. ## algebra 1

graph the function for the domain of 3x -y=1;D:(-3,-1,0,4)

80. ## physics

10. The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle (r = 12.4 m) as the carousel turns. The coefficient of static friction between the suitcase

81. ## Math - Polynomials

off-topic: yay it's friday :D Simplify each polynomial. 1. 6g + 8k + 9g + 2k A) 3g + 10k B) -3g + 10k *** C) 17gk D) 10k - 3 2. -4x + 6x2 + 5x A) 7x^3 B) 6x^2 + 9x *** C) 6x^2 - 9x D) 6x^2 + x 3. a^2 + 5a - 3a^2 A) 5a + 2a^2 *** B) 5a - 2a^2 C) 2a^2 + 5a

82. ## physics

A wheel starts from rest and rotates with constant angular acceleration to an angular speed of 9.3 rad/s in 1.39 s. Find the magnitude of the angular acceleration on the wheel

83. ## Physics

A neutron with a mass of 1.67x10^-27 kg traveling east with a kinetic energy of 2.00x10^-21J collides perfectly elastically with helium nucleus with a mass 6.68x10^-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy

84. ## Physics

A neutron with a mass of 1.67x10^-27 kg traveling east with a kinetic energy of 2.00x10^-21J collides perfectly elastically with helium nucleus with a mass 6.68x10^-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy

85. ## physics

A neutron with a mass of 1.67x10^-27 kg traveling east with a kinetic energy of 2.00x10^-21J collides perfectly elastically with helium nucleus with a mass 6.68x10^-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy

86. ## physics

Two people jump out of an airplane. They hold on to each other while falling straight down at a shared terminal speed of 60.7 m/s. Suddenly, they push away from each other. Immediately after separation, the first skydiver (who has a mass of 89.3 kg) has

87. ## maths

If 5 1/2 yards = 1 rod and 3 feet = 1 yard,how many rods are equivalent to 1 foot? 1. 2/11 2. 6/11 3. 2/33 4. 11/6 5. 11/2 6. 11/8

88. ## Math

36. A clock gains 20 minutes each day. if the correct time is indicated now , in how many days will it again show the first correct time? Please show work/explain A.8 B.18 C.20 D.36 E.72

89. ## poem

Title:The dawn it comes There once was a boy named John whose never saw the dawn. When the sun went down and went to the pond. And saw what was dim. Is this a good poem? This is a limerick, lines 1,2,and 5 must rhyme.Lines 3 and 4 must rhyme. Please help

90. ## chemistry

In which of the following triatomic molecules or ions are both of the bonds multiple bonds? HCN CO2 NO2 more than one correct response no correct response If more than one correct response then please show all the correct answers. thanks

91. ## algebra

simplify the number using the imaginary unit i. √-16

92. ## phyics

A ball is thrown straight upward. At 5.00 m above its launch point, the ball’s speed is one-half its launch speed. What maximum height above its launch point does the ball attain?

93. ## financial management

What is the value of a share of common stock that paid \$2.00 last year, the growth rate is 8%, assume the risk free rate is 4%, the market return is 10% and the Beta is 1.5.

94. ## Calculus

A 40-foot ladder is leaning against a house when its base starts to slide away. By the time the base is 32 feet from the house the base is moving at a rate of 4ft/sec. a. How fast is the top of the ladder moving down the wall at that moment? b. At what

95. ## degree

16. Which article would be the most appropriate source to include in a bibliography for a research paper on stem cells? A. Carroll, Jill and VandeHei, Jim. "Mouse Cells in Stem Lines May Limit Use." Wall Street Journal 24 Aug. 2001: A3. B. Lemonick,

96. ## GEOMETRY

Angle C and angle D are vertical angles. Conclusion is that angle C and angle D are complementary. What is a counterexample of the conclusion?

97. ## Math

Which lists all the factors of a composite number? A) 1,3,9,27 B)1,9 C)1,2,3,4,12 D)1,11

98. ## Math

Bank XYZ is hiring, and they would like to determine the number of tellers they should hire. Each teller is paid \$15 per hour. Bank XYZ has assessed a cost on customer waiting at \$10 per customer in line per hour. (In other words, each customer standing in

99. ## Chemistry

What is the pH of a solution that has a concentration of hydronium ions that is 4.7 × 10-4 molar H3O+? Show, or explain, the work used to solve this problem.