# thomas

Popular questions and responses by thomas
1. ## math

43. A phone company charges 10 cents per minute for the first 3 minutes of a call, and 10-cents for each minute thereafter.What is the cost, in cents, of a 10-minute phone call? a. 200-20c b.100c+70 c. 30+7c d.100-7c e. 100-70c please answer and explain

2. ## Mathematics

A Point X is 34m due east of a point Y.The bearings of a flagpole from X and Y are N18degreeW N40degreeE respectively. Calculate the distance of the flagpole from Y

3. ## MATH

If a square of side length x is cut in half, what is the perimeter of one of the resultant halves?

4. ## statistics

Suppose that the average score on the GMAT exam is 500 and that the standard deviation of all scores is 100 points. You would expect approximately 95% of all GMAT scores to be between

5. ## math

The iength of a rectangle is 3 inches greater than its width and its area is 88 square inches.An equation that may be used to find the width w of the rectangle is a. 3w^2=88 b. w^2/3=88 c. w^2+3w-88=0 d. w^2-3w=88 e. w=29.3 please answer and explain

6. ## Trigonometry

Find the maximum value of |r| and any zeros of r. (Assume 0 ≤ θ < 2π. Enter any zeros as a comma-separated list.) r = 5 + 10cosθ

7. ## Trigonometry

Find all solutions of the equation in the interval [0, 2π). (Enter your answers as a comma-separated list.) cos(x+3pi/4) - cos(x-3pi/4) = 1

8. ## Chemistry

Complete and balance the following molecular equation. Cu(OH)2(s)+HClO4(aq)→ And write the net ionic equation for it.

9. ## math

When x is divided by 3,the remainder is z.In terms of z, which of the following could be equal to x ? a. z-3 b. 3-z c. 3z d. 6+z e. 9+2z please answer and explain

10. ## math

A pulley whose diameter is 9 inches is connected by a belt to another pulley whose diameter is 6 inches. If the larger pulley runs at 1200 revolutions per minute, at how many revolutions per minute does the smaller pulley run? a. 800 b. 1080 c. 1600 d.

11. ## Math

Suppose f(x) = sin(pi*cosx) On any interval where the inverse function y = f –1(x) exists, the derivative of f –1(x) with respect to x is: a)-1/(cos(pi*cosx)), where x and y are related by the equation (satisfy the equation) x=sin(pi*cosy)

12. ## maths

95. Suppose that 387 people will travel on a space shuttle with room for 420 people.Each compartment seats 14 people before the next compartment opens.How many people will ride in the last compartment that opened?

13. ## Trigonometry

Write the expression as a trigonometric function of only θ, and use a graphing utility to confirm your answer graphically. cos((9π/2)-θ

14. ## physics

A spiral spring has a lenght of 14cm when a load of 4N is hung on it.A force of 6N extends the spring by 4cm.calculate the unstretched lenght of the spring.

15. ## physics

which ball has more energy a 5 kg ball rolling at 4 m/s or a 6 kg ball rolling at 3 m/s?

16. ## Calculus

Suppose that y=f(x) = sqrt(2x), x>=0 Find a c > 0 such that the tangent line to the curve y = f(x) at x = c has the same slope as the tangent line to the curve y = f^–1(x) at x = c. You get: c = 1/8 c = 1/2 c = (1/8)^(1/3) c = (1/3)^(2/3) c = (1/2)^(1/3)

17. ## math

54. The volume of certain rectangular solid is 12x. If the dimensions of the solid are the integers x,y,and z,what is the greratest possible value of z? a. 36 b. 24 c. 12 d. 6 e. 4 please answer and explain

18. ## math

If the area of a circle increases by a factor of 9, by what factor does its circumference increase ?

19. ## English

How would "In a Station of the Metro" change if the bough was bright and lively rather than wet and black?

20. ## Biology

Sort the terms and phrases as to whether they function in or describe primary growth or secondary growth? Place each term or phrase to the appropriate bin. If the term or phrase describes both primary and secondary growth, place it to the "both" bin. If

21. ## CHEMISTRY

What is the intermolecular force that exists between a magnesium ion and a hydrogen sulfide? A dipole dipole b london dispersion c ionic bond d ion dipole e ion ion

22. ## History

In Uncle Tom's Cabin, (the book) did blacks have a racial caste system? Please explain.

23. ## calculus

A snowball is melting at the rate of 2 inches per hour. How fast is the surface area of the snowball changing at the instant the snowball has a radius of 3 inches i tried (d/dt) = 4pir^2 (dr/dt) its multiple choice and -72pi isnt there so im just trying to

24. ## Calculus

For the function f(x) = x^2 - 4x +5, x>= 2, which is equal to d/dx (f-1 this is the inverse)(x)) ? 1/(2y-4) where x and y are related by the equation (satisfy the equation) x=y^2-4y+5 x>= 1 2y-4 where x and y are related by the equation y= = x^2 - 4x +5,

25. ## math

AOD is a diameter of circle O. The coordinates of points A and D are (-11,-5)and (-3,-5)Find the area of circle O. a. 9 pi b. 16 pi c. 25 pi d. 64 pi e. 116 pi please answer and explain

26. ## Computers C++

1). The name of an array stores the __________ of the first array element. 1) memory address 2) value 3) element number 4) subscript 5) None of these

27. ## Calculus AB

For the function f(x) = sqrt(9-x), which is equal to d/dx(f-1( -1 is the inverse)(x)) a) -2x b) sqrt(x) + 9 c) x^2 + 9 d) 2x e) 9-x^2

28. ## math

In a certain boy's camp, 30% of the boys are from New York State and 20% of these are from New York City.What percent of the boys in the camp are from New York City? a. 60% b. 50% c. 33% d. 10% e. 6% please answer and explain

29. ## CHEMISTRY

I know this question is already on here but the answer wasn't helpful to me. Liquid Sodium can be used as a heat transfer fluid. Its vapor pressure is 40.0 torr at 633 C and 400.0 torr at 823 C. Calculate its heat of vaporization.

30. ## Mathematics

A bag contains 6 blue balls, 4 green and 2 red. If you put your hand in and picked a ball at random what are the chances it is blue? A. 45% B. 60% C. 50% D. 33.3%

31. ## Maths

How many squares in the plane have two or more vertices on dots in this 2x3 grid? All dots are an equal distance from their nearest neighbours. *diagonal squares count* -------------------------------------- I can only get 18, but some of my class members

32. ## Math

Suppose f(x) = 4x^5-(1/x^4) Find the slope of the tangent line to the graph of y = f^–1(x) at (3, 1). You get: 1/24 1/16 00062 1620 972

33. ## Calc AB

Suppose that f(x) is an invertible function (that is, has an inverse function), and that the slope of the tangent line to the curve y = f(x) at the point (2, –4) is –0.2. Then: (Points : 1) A) The slope of the tangent line to the curve y = f –1(x) at

34. ## maths

99. From a box containing 5 black marbles,8 pink marbles, 6 white marbles, and 5 yellow marbles, Kim removed 4 marbles,one of which was black.If she removes one more marble at random,what is the probability that it will be black? a. 1/6 b. 4/21 c. 1/5 d.

35. ## math

In triangle ABC, angle B = 3, angle A and angle C = 8 angle A. How many degrees are there in angle B ? a. 15 degree b. 30 degree c. 45 degree d. 60 degree e. 120 degree please answer and explain

36. ## math

If the side of a square increases by a factor of 3, by what factor does the area of the square increase?

37. ## Physics; Elect.

1. A charge (uniform linear density=9.0 nC/m) is distributed along the x-axis from x=0 to x=3.0m. Determine the magnitude of the electric field at a point on the x axis with x=4.0m. a)81 N/C b)74 N/C c)61 N/C d)88 N/C e)20 N/C 2. A +2nC point charge is

Which of the following bonding patterns DOES NOT happen? C-H-C =C= H-H All of these bonding patterns can happen.

39. ## Managerial ECON

Suppose that a firm is currently employing 20 workers, the only variable input, at a wage rate of \$60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed cost is \$3,600. a. What is marginal cost? b. What is

40. ## English

Replace the nouns with pronouns Martha and I had to leave early after school?

41. ## Trigonometry

Convert the rectangular equation to polar form. Assume a > 0. x^2 + y^2 - 9ax=0

42. ## Trigonometry

This was a bit much to type out, so I took a snip of it. drive.google.com/file/d/1AUtOTEvfSw-cvv5_tCm9hk1NsADr0vZP/view?usp=sharing

43. ## Chemistry

Using the activity series (Table 4.5), write balanced chemical equations for the following reactions. If no reaction occurs, simply write No Reaction. Chromium metal is immersed in an aqueous solution of cobalt(II) chloride.

44. ## math

The average monthly temperatures in New Orleans, Louisiana, are given in the following tables: MonthJFMAMJ°C 16.5 18.3 21.8 25.6 29.2 31.9 MonthJASOND°C 32.6 32.4 30.3 26.4 21.3 18.0 What characteristics of the function correspond to the constants a, b,

45. ## Calculus applications

6. The bending moment (M) along a beam is M = WLx/2 -Wx2/2 kNm where x is the distance of a beam length L from the left hand end. W is the weight per unit length. (a) Shear force is calculated as the differential of bending moment. Find an expression for

46. ## Math

Find the coordinates of the point at 180 degrees on a circle of radius 3.4 centered at the origin. Round your answers to three decimal places, if required. ( , 0 ) I got 0 as the y coordinate. Please help me solve for x

47. ## math

The number of diagonals, d, in a polygon of n sides is given by the formula d=n^2-3n/2. If a polygon has 90 diagonals, how many sides has it? a. 8 b. 10 c. 12 d. 15 e. 20 please answer and explain

48. ## math

If r = square root 3V/pi*h , by what number must we multiply V in order to multiply r by 9 ? a. 3 b. 9/2 c. 9 d. 18 e. 81 please answer and explain

49. ## 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.

50. ## math ( Terminology )

The " lumper " of a number is equal to the sum of all the prime numbers less than that number. If the lumper of x is equal to the lumper of x + 3, which of the following is a possible value of x ? a. 7 b. 8 c. 9 d. 10 e. 11 please answer and explain

51. ## Computers C++

1.) Look at the following array definition. int numbers[] = { 2, 4, 6, 8, 10 }; What will the following statement display? cout

52. ## Physics

What is the maximum equipment needed to determine the power dissipated in a resistor of unknown value? 1) a voltmeter, only 2) An ammeter only, 3) a voltmeter and an ammeter only 4) a voltmeter, an ammeter, and a stopwatch

53. ## Math

how do i find the revolutions per minute of a pulley that is turned 120 degrees per second?

54. ## Chemistry

Complete and balance the following molecular equation. Al(OH)3(s)+HNO3(aq)→ And write the net ionic equation for it.

55. ## Chemistry

What is the net ionic equation for HBr(aq)+Ca(OH)2(aq)→?

56. ## Chemistry

We are asked to write the three products of the reaction between CH3COOH and NaHCO3(given one is a gas) They would be, 1)CH3COO^-(Na)^+ 2)CO2(g) And what would be the third product? As NaHCO3 is acidic would that be Na2CO3? Because CH3COO^-(Na)^+ is a weak

57. ## math

Tom used 5/8 yard of ribbon to tie weights on the tail of his kite. He cut the length of ribbon in equal pieces that were 1/12 yard long. How many pieces, each 1/12 yard long did Tom cut from the 5/8 yard ribbon?

58. ## Math

All students in Peter's class have \$1.05, consisting of nickels and/or dimes and/or quarters. Each student has a different combination of coins, and all possible combinations of coins are included. What is the probability that Peter is unable to give his

59. ## math

4 red marbles, 3 green, 2 yellow. you pick 2 at random.What is probability of a. 1 yellow & 1 red b. 2 green

60. ## Math

A train leaves San Diego at 1:00 PM. A second train leaves the same city in the same direction at 4:00 PM. The second train travels 78 mph faster than the first. If the second train overtakes the first at 6:00 PM, what is the speed of each of the two

61. ## Finance

Problem 10-32 Project Evaluation [LO1] Aria Acoustics, Inc. (AAI), projects unit sales for a new seven-octave voice emulation implant as follows: Year Unit Sales 1 86,000 2 99,000 3 113,000 4 108,000 5 89,000 Production of the implants will require

62. ## math

If the number of square inches in the area of a circle is equal to the number of inches in its circumference,the diameter of the circle is a. 4 inches b. 2 inches c. 1 inches d. pi inches e. 2 pi inches please answer and explain

63. ## math

When a is divided by 7,the remainder is 4.When b is divided by 3,the remainder is 2.If 0

64. ## math

SHURGRO fertilizer contains 18% ammonia plus carbon compounds.If 80% of the ammonia contains the chemical element nitrogen, what percent of this fertilizer is nitrogen? a. 14.4% b. 18% c. 38% d. 40% e. 62% please answer and explain

65. ## math

The area of a triangle whose legs are in the ratio of 2:3 is 48. The length of the hypotenuse is a. square root 13 b. 8 c. 2 square root 52 d. 12 e. 208 please answer and explain

66. ## Math word problems

Susan uses 15 rolls of ribbon to decorate 10 wedding baskets. Each roll of ribbon is 5 3/8 yards long. After she decorates the baskets, she decides to cut off another 3/4 yard from the ribbon of each basket. Write and simplify an expression to fin out how

(a) At a certain instant, a particle-like object is acted on by a force F=(2.9N)i-(1.7N)j+(5.7N)k while the object's velocity is v= -(3.2m/s)i+(4.5m/s)k. What is the instantaneous rate at which the force does work on the object? (b) At some other time, the

68. ## math

The square of negative nonzero integer is equal to four times of its absolute value. What is the integer?

69. ## math

If the radius of a circle is doubled, by what factor does the circumference increase?

70. ## math

A circle has an area of 25 pi cm^2.If a circle is drawn within that circle with a diameter equal to the radius of the first circle, what is the area of the second circle? a. 2 1/2 pi cm^2 b. 4 1/4 pi cm^2 c. 5 1/4 pi cm^2 d. 6 1/4 pi cm^2 e. 7 1/2 pi cm^2

71. ## CHM

As the number of solute particles in a given volume of solution increase will: freezing point increase, vapor press decrease? or vice versa or boiling point increase, vapor pressure decrease? or vice versa?

72. ## psychology

Hello, where can I look to find the answer for how are research methods Godly?

73. ## college physics

Each of four particles moves along an x-axis. Their coordinates (in meters) as functions of time (in seconds) are given by: Particle #1: x(t)=2t^2-4 Particle #2: x(t)= -3t-4 Particle #3: -2t^2-4 Particle #4: 2 *[sq. root (t+1)] -4 Which of these particles

74. ## math

True or false? In every triangle, the centroid, incenter, and circumcenter are collinear.

75. ## calculus - limits

can someone help me determine that limit for the following function, as x --> -2? 2 - abs(x) / 2 + x

76. ## math

A class elects two officers, a president and a secretary/ treasurer, from its 12 members. How many different ways can these two offices be filled from the members of the class?

77. ## Science

Which gas found in the Earth's atmosphere greatly impacts the daily range of temperature on Earth. A) oxygen B) hydrogen C) nitrogen D) water vapor

78. ## Math

Find the distance traveled in 24 seconds by an object traveling at a constant velocity of 14 feet per second.

79. ## Trigonometry

Find the maximum value of |r| and any zeros of r. (Assume 0 ≤ θ < 2π. Enter any zeros as a comma-separated list.) r = 19 - 19sinθ

80. ## Math

Determine the proceeds of a promissory note for \$3,600 with interest at 6% p.a. compounded quarterly, issued September 1, 2008, due on June 1, 2014, and discounted on December 1,2010 at 8% compounded semi-annually.

81. ## Math

What would (4sqrt(3)-2sqrt(5) be multiplied by to get a product of (4sqrt(3))^3 - (2sqrt(5))^3?

82. ## Physics

A single sphere of water is created by joining 1000 of water spheres of radius r and charge (+Q).If the potential of the small and big spheres are w and v respectively, find v/w. My thoughts : The masses of the spheres are proportional to the third power

83. ## Science

Why do earthquakes appear near the San Andreas Fault?

84. ## Math

A test has 12 problems, and each problem is worth 5 marks. Full marks are given for a correct answer, 2 marks are given if there is no answer, and no marks are given for an incorrect answer. Some scores between 1 and 60, are impossible to get on this test.

85. ## Math

In Alaska Mt.McKinley is 890 meters taller than Mt. Foraker and 1198 meters taller then Mt. Blackburn is 4996 meters. What is the height of Mt. Foraker?

86. ## Math

There are 52 white keys on a piano. The lowest key is A. The keys are designated A, B, C, D, E, F, and G in succession, and then the sequence of letters repeats, ending with a C for the highest key. a) If five notes are played simultaneously, in how many

87. ## Math

IF the LCM of two numbers a and b is 40, what is the LCM of 7a^2 and 7b^2?

88. ## Calculus applications

A steel factory wishes to make a cylindrical container, of thin metal, to hold 100cm³, using the least possible area of metal. If the outside surface is S cm² and the radius is r cm, show that S = 2πr² + 200r-1 and hence find the required radius and

89. ## math

Dee used 2 1/3 cups of sugar for a cake recipe.If the amount of sugar the container holds is 3 times the amount she used,does the container hold more than,less than,or equal to 3 cups of sugar

90. ## math

How can x-8 be modeled by being described as a situation? Answer:8x

91. ## Physics

Which one of the following actions would make the maxima in the interference pattern from a grating move closer together? A.Increasing the distance to the screen. B.Increasing the number of lines per length. C.Decreasing the number of lines per length.

92. ## chemistry

under what conditions could the decomposition of Ag2O(s) into Ag(s) and O2(g) proceed spontaneously at 298 K? 2Ag2O(s)---->4Ag(s)+O2(g) dG=22.42 Kj answer= 0.000118 atm.

93. ## chemistry

dG for the formation of Hi(g) from its gaseous elements is -20.2 kj/mol at 500k. when the partial pressure of HI is 10 atm, and I2 0.001 atm, what must the partial pressure of hydrogen be at this temperature to reduce the magnitude of dG for the reaction

94. ## GEOMETRY

cASEY SIGHTS THE TOP OF AN 84 FOOT TALL LIGHTHOUSE AT AN ANGLE OF ELEVATION OF 58 DEGREE. IF CASEY IS 6 FEET TALL, HOW FAR IS HE STANDING FROM THE BASE OF THE LIGHTHOUSE. I DO NOT UNDERSTAND WHAT IS ANGLE OF ELEVATION CAN YOU SHOW ME AN EXAMPLE PLEASE

95. ## math

If the circumference of a circle is the same as the perimeter of the square with a side as 4 pi in, what is the area of the circle in square inches?

96. ## Physics

If the thickness of the probe in the direction of B is 1.97 mm, calculate the charge-carrier density (each of charge e).

97. ## math

J.C. Nichols department store reports that the average sales on Saturdays is twice that on Thursdays and the average sales on Thursdays is twice that on the other four days.What fraction of the weekly sales are made on Thursdays? a. 1/7 b. 1/5 c. 2/7 d.

98. ## math

A cow is attached to a rope 10 feet long in a pasture bordered by two fence( more than 10 feet long) meeting at an angle of 60 degree. What is the area of the space in which the cow is grazing? a. 20 pi b. 5 pi /3 c. 20 pi /3 d. 50 pi /3 e. 100 pi please