Abbey

Most popular questions and responses by Abbey
1. math help

Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft. Use 3.14 for ð and round to the nearest tenth

2. Math help

A pyramid has a height of 5 in. and a surface area of 90 in2. Find the surface area of a similar pyramid with a height of 10 in. Round to the nearest tenth, if necessary

3. Algebra

Does the data in the table represent a direction variation or an inverse variation, write an equation x 1 2 5 10 y 40 20 8 4 My answer is a direct variation, y=40x, is this correct? here are the other answers direct variation 7=1/40x inverse variat xy=40

4. Math

A boat is sailing due east parallel to the shoreline at a speed of 10 miles per hour. At a given time the bearing to the lighthouse is S 70 degrees E, and 15 minutes later the bearing is S 63 degrees E. Find the distance from the boat to the shoreline if

5. Math

Emily receives her paycheck. She spends 1/6 on food. She spends 3/5 of remaining amount on house payment. She spends 1/3 of what is left on her other bills. She spends 1/4 of the remaining money for entertainment. This activity leaves her with \$150. What

6. Math

2.A newspaper started an online version of its paper 14 years ago. In a recent presentation to stockholders, the lead marketing executive states that the revenues for online ads have more than doubled that of the revenues for printed ads since starting the

7. science

what do you think should be the motion of an airplane preparing for take off?

8. Chem

The vapor pressure of liquid chloroform, CHCl3, is 400.0 torr at 24.1°C and 100.0 torr at -6.3°C. What is ΔHvap (in the unit of kJ) of chloroform?

9. math help

ind the radius of a sphere with a surface area of 804 cm2

10. Math

The sides of two similar trapezoids are in a ratio of 1:3. The area of the smaller trapezoid is 12 inches squared. Find the area of the larger trapezoid

A ladder is leaning against a house and is forming a 60 degree angle with the ground. If the top of the ladder is 18 feet off of the ground, how long is the ladder? Leave your answer in exact form.

Approximate the equation's solutions in the interval (0,2pi) sin2x sinx = cosx 2cos(x) (1/2-sin^2x) = 0 Then I got 3pi/2, pi/2, pi/6 and 5pi/6 Then I substituted 0-3 and got 3pi/2 , 5pi/2 , 9pi/2 , pi/2, pi/6, 7pi/6, 13pi/6 , 19pi/6 , 5pi/6 , 11pi/6 ,

13. US history

What did England and the English settlers really want from colonization? National Glory? Wealth? Adventure? A solution to social tensions? New sources of goods and trade? Did they get what they wanted?

14. Math

An aeroplane flew from city G to city H on a bearing of 24degree. The distance G and H is 250km. It then flew a distance of 180km to city J on a bearing of 055degree. calculate (a) the distance from G to J (b) how far north of H is J

15. Math

Find an equation for the ellipse. center:(3,2) a=3c Foci:(1,2)(5,2) h=3 k=2 I do not know where to start.

16. calculus

Cos(pi/12) solve using half angle formula

17. Math

Find the quadratic function that has the indicated vertex and whose graph passes through the given point. Vertex: (2,3) Point: (0,2) I do not know how to do this! Please explain!! Thank You

18. Math

Q. Coles sleeping bag has four sides. The side with the zipper is parallel to the opposite side. None of the angles where the sides meet are right angles. The side opposite the zipper is shorter than the side with the zipper. The other two sides are the

19. Pre-Cal

Find the exact sine value of the angle in standard position whose terminal side goes through the point (-1,5) I do not know when to start

20. chemistry

Bill finds an unusual object and wishes to calculate it's density. He discovers a problem of accurately weighing it, because it won't stay on the weighing pan. To solve this he adds the object to a beaker containing 190 mL of distilled water and finds the

21. Math

Q. Tim and Jorge hope they will be assigned to the same cabin at the summer camp. Each cabin has 8 beds in it. And Tim knows that he is saying in the green cabin not the red cabin. If there are 14 boys going to camp in addition to Tim and Jorge. What is

22. english

Writing through film- Night of the Living Dead 1. Who are the four main characters of this film? 2. What subgenre does this film fir under? Give 2 examples from the movie that share why it fits the chosen subgenre? 3. Why did the lady kick off her shoes?

23. chemistry

Lead pipes were once used to transport drinking water and are still found in some older homes and city water systems. Suppose the lead concentration and pH of the water determined by lead (II) hydroxide (Ksp = 2.8x10^-16) dissolving to produce a saturated

For a carbon atom that is sp2 hybridized, I understand that the electron configuration would be Yes, 1s2 2s1 2p3 which is a 2s up arrow,and 3 orbtials that are 2p up arrows but then since the four bonds hybridize to form four sp3 hybrid bonds how do I

use trigonometric identities to transform one side of the equation into the other. cos Q sec Q = 1

26. Statistics

Let x and y be the amounts of time (in minutes) that a particular commuter must wait for a train on two independently selected days. Define a new random variable w by w = x + y, the sum of the two waiting times. The set of possible values for w is the

27. Physics

How fast must the ball rolled along the surface of a 70cm high table so that when it roll off the edge it will strike the floor at the same distance (70cm) from the point directly below the edge of the table.

28. Math

Find the vertex, focus and directrix of the parabola. 4x - y^2 - 2y - 33 = 0 y^2+2y+1 = -4x+33+1 (y+1)^2 = -4(x+8.5) vertex:(-1,-8.5) focus:(-2,-8.5) Directrix: x=0 Is this correct?

29. Geometry(Very Urgent!!!)

Triangle NQP is an equilateral triangle with the measure of angle N=5x-2y and the measure of angle P=x+2y. Find the values of x and y. Show all work to receive credit.

30. Discrete Math

1.Using the principle of inclusion-exclusion find the numbers of integers between 1 and 1000 (inclusive)that are divisible by at least one of 2,3,5,or 7? 2.A drug store sells gum, candy, and playing cards. 15 teenagers are in the store...the clerk notes

31. Calculus

A \$99,000 mortgage for 30 years at 9% APR requires monthly payments of \$796.58. Suppose you decided to make monthly payments of \$1,100. When would the mortgage be completely paid? I am using a present value of annuity eguation but don't know how to solve

32. Math

Determine two coterminal angles (one positive and one negative) for the given angle. Give your answer in radians. A) 8pi/9 B) 8pi/45 For 8pi/9 I added 18pi/9 which equals 26pi/9 - 18pi/9 = -10pi/9. I do not know how to find the positive one for 8pi/9 and I

33. Comma help

Choose the option that corrects the sentence below. If the sentence is correct, select “d. The sentence is correct.” Commander-in-Chief Sam Houston defeated the Mexican army and captured Santa Anna in 1836 A Commander-in-Chief, Sam Houston, defeated

1) Write the first five temrs of the geometric sequence a1 = 2 r=sqrt3 I know the first term is 2 but the sqrt 3 threw me off so I do not know how to find the next numbers. 2) Find the nth term of the geometric sequence. a2 = 3 a5 = 3/64 n=1 I know the

35. Math

Test for symmetry with repsect to Q=pi/2, the polar axis, and the pole. r=16cos 3Q r=16cos(3pi/3 + 3h) = 16(cos3pi/2 3h- sin 3pi/2 sin h) cos 3pi/2 = 0 sin 3pi/2 = -1 Not symmetrical My teacher said that this was wrong!Why?

Do the letters "UDM" stand for "Usage Determines Message?"

37. Physics

A steam-electric power plant delivers 900 MW of electric power. The surplus heat is exhausted into a river with a flow of 2.91×105 kg/s, causing a change in temperature of 1.07 oC. A. What is the efficiency of the power plant? B. What is the rate of the

38. Math

find the slope of (3,4) (6, -2)

39. history

im working on persuasive essays, the question is asking me to write a response showing where his essay proves to be more persuasive. Could i get some help on which points were more persuasive than others? i didn't think his speech was meant to be

40. science

over seven days, a plant grew from 12 cm to 33 express its average growth rate in cm/day

41. Earth Science

What is the primary basis for differentiating the Eras?

42. Pre-Cal

evaluate the trigonometric functions by memory or by constructing appropriate triangles for the given special angles. a) csc 30 degrees b) sin pi/4 = sqrt2 / 2 I just do not know how to find csc 30 degrees.

43. Physics

Pls sir, kindly send the solution to my email. thanks. 1)A boat propelled so as to travelled with a speed of 0.50m/s in still water, moves directly ( in straight line ) across a river that is 60m wides. The river flow with a speed of 0.30m/s. How long in

44. Math

Projectile motion: Let's suppose you throw a ball straight up with an initial speed of 50 feet per second from a height of feet. a) Find the equation that describes the motion as a function of time. My answer was x = 0 and y=-16t^2+50t+6 b) How long is the

Use synthetic division to show that x is a solution of the third-degree polynomial equation, and use the result to factor the polynomial completely. List all the real zeros of the function. x^3 - 28x - 48 = 0 Value of x = -4 Please help!!Thank you

46. Earth Science

which geologic era had the shorest time span and the longest time span? 1) Longest = paleozoic 20 shortest = cenozoic Is this correct?

47. math

What is an Improper Fraction? An improper fraction has a numerator that is larger than its denominator. 13/4 is an improper fraction. It needs to be converted into a proper fraction by dividing the numerator by the denominator: 13 ÷ 4 It would become 3¼.

48. US History

Describe the role of the Quakers, Puritans, and Indians and how each of these groups felt about these leading nations. (By leading nations I mean the three world powers; Great Britain, France, Spain) This is only half the question. I answered the first

49. Chemistry

I am having trouble figuring out the electron configuration for a carbon atom when it is in a molecule such as methane. I know that the ground state configuration for carbon is 1s2 2s2 2p2 but im not sure how to figure it out when it is bonded to other

50. College Chemistry

When determining the vapor pressure of water, the bubble volume is 1.2mL at 5 degrees celsius. -How many moles of dry air were in the bubble? (assume 1 atm) -If the bubble volume is 8.6mL at 75 degrees celsius, what is the partial pressure of the dry air

51. calculus

Find all solutions to the equation in the interval [0,2pi) Cosx-cos2x

52. Math

Eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve. x = sec Q y = cos Q x^2 + y^2 = 1/cos^2 + sin^2/cos^2 = x^2(1 +sin^2) = x^2(2-cos^2) x^2(2-1/x^2) = 2x^2 - 1 x^2 - y^2 = 1 My teacher said to use

53. Math

Determine two coterminal angles (one positive and one negative) for the given angle. Give your answer in radians. A) 8pi/9 B) 8pi/45 For 8pi/9 I added 18pi/9 which equals 26pi/9 - 18pi/9 = -10pi/9. I do not know how to find the positive one for 8pi/9 and I

2) Use the sum and difference identites sin[x + pi/4] + sin[x-pi/4] = -1 sinx cospi/4 + cosxsin pi/4 + sinx cos pi/4 - cosx sin pi/4 = -1 2 sin x cos pi/4 =-1 cos pi/4 = sqr2/2 2sin^x(sqrt2/2) = -1 sin x = -sqrt2 x = 7pi/4 and 5pi/4 Am I correct?

1) Use the half-angle formulas to determine the exact values of the sine, cosine, and tangent of the angle. 67 degrees 30'

56. Physics

How much work is required to lift a bag of wheat (mass 50kg) to a height of 2.4m?

57. trig

solve for x in the following equations: 1) sin(arcsin x) = 1 2) 2arcsin x = 1 3) cos(arccos x) = 1/3

58. Math

Find an equation of the parabola. vertex:(-1,2) focus:(-1,0) (x+1)^2 = 4p(y-2) (x+1)^2 = 0(y-2) (x+1)^2 = (y-2) Correct?

59. Math

Eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve. x = sqrt t y = 1 - t

60. Physics

A bullet with mass 0.40 kg is fired with an initial velocity of 400 m/s from a gun with mass 5.0 kg. The speed of the reoil of the gun is? Do I have to 0.40 and 5.0 an then divide that by 400?

61. Math

Find the slope of the line containing the two points (1,-1) and (-5,-3).

In triangle ABC, D is the centroid and M is the midpoint of segment AC. If BD=x+9 and DM=6, find MB. Answer choices: 9 , 3, or 18.

63. English & Verbs

Verbs have totally escaped my mind at the moment. I need help with this question. Which of the following sentences contaions the same sentence structure as "She opened her book" 1. George seemed pleased 2. Tim strummed his guitar 3. Sue is a superb athlete

64. child day care

my budget allows me to buy only one software for my children ages 5-8. which one of the following packages would be best for this age group A. ages7-9 B. ages 6-9 C. ages 4-7 or ages 6 and up

65. Math

For the function x^2 + 2x - 4 , find lim f(h+4) - f(4) / h h-->0

66. Math

Test for symmetry with respect to Q=pi/2 , the polar axis and the pole. r = 16 cos3Q Please explain. I do not know how to do this. Thank You!!

Projectile motion: Let's suppose you throw a ball straight up with an initial speed of 50 feet per second from a height of feet. a) Find the equation that describes the motion as a function of time. My answer was x = 0 and y=-16t^2+50t+6 b) How long is the

68. Math

Eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve. x = secQ Y = tanQ Would I use cos^2Q + sin^2Q = 1?

69. Pre-Cal

Express the function in the form f(x) = (x-k)q(x) + r for the given value of k. f(x) = 15x^4 + 10x^3 - 6x^2 + 14 Value of k = -2/3 I do not understand what I am suppose to do!

70. Math

Find the quadratic function that has the indicated vertex and whose graph passes through the given point. Vertex: (2,3) Point: (0,2) I do not know how to do this! Please explain!! Thank You

71. Pre-Cal

Find the maximum value of f(x) = -2x^2 + 12x - 14 Do i have to set this equal to o to solve?

72. Pre-Cal

sqrt2 /10 Do I just leave this as sqrt2/10 or can I reduce it to sqrt1/5?

73. physics

An ideal gas occupies a volume of 1.87 cm3 at 15.7°C and a pressure of 101,325 Pa. a) Determine the number of molecules of gas in the container. Boltzmann’s constant is 1.38 x 10-23 m2kg/s2K Answer: b) Determine the total internal energy of the gas.

74. science

how will you describe the speed of the plane from the rest until it takes off?

75. Math

I need help on my math the question is make up a set of at least 12 numbers that have the following landmarks with maximum:8 range:6 mode:6 median:5 can you help me solve this equation

76. child care

children who attend a program that has some theoretical basis for planning have A. more material to play than those that have no theory B. more positive experience C. less marked developmental gain D. less positive experience

77. child day care

large scale entry doors shouldn't be used at child care facilities because they A. appeal to adult B. are inviting to small children C. can make children feel small and less welcome D. create a welcoming environment for children and staff

78. Geometry

If the ratio of the areas of two similar hexagons is 4:49, find the ratio of their apothems

79. College Chemistry

When determining the vapor pressure of water, the bubble volume is 1.2mL at 5 degrees celsius. -How many moles of dry air were in the bubble? (assume 1 atm) -If the bubble volume is 8.6mL at 75 degrees celsius, what is the partial pressure of the dry air

80. marine science

Which directions do the blood and water go in a fish gill?

81. science

if an objects moves 5 cm/h what is its rate expressed in cm/day

I am trying to find the standard form of this equation for an ellipse. 9x^2 + 4y^2 - 36x + 8y + 31 = 0 First I grouped the x and y's together. 9x^2 - 36x + ? + 4y^2 + 8y + ? = -31 + ? + ? Then I factored the 9 and 4. 9(x^2-4x+4) + 4(x^2+2x+1) = -31+36+4

83. Math

I need to show that the right side equals the left side but I am having a little trouble simplifying. k(2k+1) +(4(k+1)-1) = (k+1)(2(k+1)+1) k^2+2k+3 For the right side?

84. Math

The lesson that I am working on is called mathematical induction. The only problem is that the lesson was not explained very clearly due to a problem with the recording so I have no idea how to complete this problem. Find p k+1(This is little under the p)

divide by long division. divide x^3 + 4x^2 - 3x - 12 by x^2 - 3

1)tan Q = -3/4 Find cosQ -3^2 + 4^2 = x^2 9+16 = sqrt 25 = 5 cos = ad/hy = -4/5 Am I correct? 2) Use the sum and difference identites sin[x + pi/4] + sin[x-pi/4] = -1 sinx cospi/4 + cosxsin pi/4 + sinx cos pi/4 - cosx sin pi/4 = -1 2 sin x cos pi/4 =-1 cos

sqrt2 /10 Do I just leave this as sqrt2/10 or can I reduce it to sqrt1/5?

A cable that is used to support a 76 foot tower is secured to the ground 31 feet from the base of the tower. Find the angle of elevation to the nearest degree that the cable makes with the ground. Answer choices: 22 degrees, 24 degrees, or 68 degrees.

The vertices of triangle ABC are (2,2), B(3,-1) and C(0,1). Find the coordiantes of the circumcenter.

In acute triangle ABC, segment AD is an altitude, the measure of angle ADB=2x^2+40, BD=9x-3, and DC=6x+15. Find BC.

91. ASCA

Justin and Mike are learning to how to ski. Justin falls down every 30 feet. Mike falls down every 25 feet. if they start skiing from the same point , how far is the first point where they will both fall down?

92. child care

an appropriate sensory motor for a child up to eight month of age is A. touching toys of a different shapes, sizes and texture B. playing with puzzles with a few large pieces C. drawing with crayons or markers D. stringing large bead on a shoelace

93. College Chemistry

When determining the vapor pressure of water, the bubble volume is 1.2mL at 5 degrees celsius. -How many moles of dry air were in the bubble? (assume 1 atm) -If the bubble volume is 8.6mL at 75 degrees celsius, what is the partial pressure of the dry air

94. robert

We finally reached Enkhuizen, an ancient harbor town, where the brisk wind from the sea was blowing so hard that we had to hold on to hats, skirts, and scarves. We walked with farmers and their families to the ferry boat. The farmers were holding baskets

Which of the following groups of words in bold is nonrestrictive and should therefore be set off with commas in the sentence My yarn WHICH IS BLUE AND GRAY will make a very pretty scarf. Hats KNITTED BY MY MOTHER are worn all winter by my family. The

96. English help

add the comma to the sentence As they studied the film they noticed some rules of science at work i wrote mine like this As they studied the film, they noticed some rules of science at work

97. science

if a car travels 93 km/h, what rate is it traveling in km/min

98. algebra

60 - (15)(2)/3

99. french

Why must one say classe de francais, for french class, and not classe francaise? How does one know when to use de in a descriptive phrase?