# carly

Popular questions and responses by carly
1. ## math

One member of the debate team is going to be chosen President. Each member is equally likely to be chosen. The probability that a girl is chosen is 2/3 the probability that a boy is chosen. If the debate team has 20 people, how many girls are there?

2. ## math

A lawyer drives from her home, located 6 miles east and 10 miles north of the town courthouse, to her office, located 4 miles west and 14 miles south of the courthouse. Find the distance between the lawyer's home and her office. I know the answer is 26

3. ## Calculus

Find the largest and smallest values of the given function over the prescribed closed, bounded interval of: f(x)=(3x-1)e^-x for 0

4. ## Maths

Two ships leave from the same port. One ship travels on a bearing of 157 degrees at 20 knots. The second ship travels on a bearing of 247 degrees at 35 knots. (1 knot is a speed of 1 nautical mile per hour). Calculate the bearing of the second ship from

5. ## math

How do I solve for F here? Solve C = 5/9(F-32) for F

6. ## math

16. Assume that there are 20,000 runners in the New York City Marathon. Each runner runs a distance of 26 miles. If you add together the total number of miles for all the runners, how many times around the globe would the marathon runners have gone?

7. ## Mathematics question

A zoo keeper weighed some of the animals at Melbourne Zoo. He found that the lion weighs 90 kg more than the leopard, and the tiger weighs 50 kg less than the lion. Altogether the three animals weigh 310 kg. How much does the lion weigh? (A) 180 kg (B) 150

8. ## Physics

Musicians can use beats to tune their instruments. One flute is properly tuned and plays the musical note A at exactly 440Hz. A second player sounds the same note and hears that her flute is slightly "flat" (that is, at too low of a frequency). Playing at

9. ## physics

Three blocks on a frictionless surface are connected by massless strings, with M1 = 1.40 kg, M2 = 2.40 kg, and M3 = 3.60 kg. Due to the force F acting on M3, as shown, the system accelerates to the right. Given that T1 is 3.50 N, calculate T2

10. ## Math

5432-54342890n3-432983n-34njnkjdm-49-fjsok n=4569 j=498323 k=678 d=567 m=5803 f=5647 s= 128 s=647382

11. ## science

In science, my question is What is the volume of a pea? 1)What does pea means? i think it is a fruite, buut i am not sure.. 2)I forgot what volume means in science. 3)i don't know what to do. AND 4)I NEED HELP!!!!!!!!!!

At the annual Grade 8 ski trip, for every 2 students who skied, 3 snowboarded. Ninety-six students snowboarded. How many students skied? Show your work. Can someone help???

13. ## math

I'm working on a math project about a track and field olympic event. The question is, is the relationship between the years and time values linear or exponential? So I selected an event and I can see that as the years have passed, the time has decreased,

14. ## Math

The producer of a 30 minute tv documentary about world war 1 divided it into two parts. four times as much program time was devoted to the causes of the war as to the outcome. how long is each part of the documentary?

15. ## Math

Find all points on the x-axis of a Cartesian coordinate system that are 20 units from the point (0,12) The point (0,12) would just be 12 points up on the y axis, so wouldn't I just count 20 spaces to the left and right so it would be (20, 12) and (-20,

16. ## Science

1. An electric space heater draws 15.0 A from a 120 V source. It is operated, on average, for 5.0h (hours) each day. a) How much power does the heater use and b) At \$.10 per kWh, what does it cost to operate the heater for 30 days? 2. Suppose each person

17. ## chemistry

Refer to 3CuCl2 (aq)+2Na3PO4 (aq) = Cu3(PO4)2+6NaCl (aq) If a student started with 18 grams of CuCl2 and enough Na3PO4 to completely react, how many grams of Cu3(PO4)2 will (theoretically) be produced?

18. ## CRIMINOLOGY

What are some examples of non-monetary restitution?

19. ## math

Direct vs. Indirect Variation The volume of the water in a swimming pool as it is filled at a rate of 200 gallons per minute. I said this is direct variation V = 200t The volume of the water in a swimming pool as the water drains at a rate of 200 gallons

20. ## math

A roller coaster is being built with a very steep drop and falls 64 feet over a horizontal distance of 160 ft. a. What is the percentage grade of this drop? Round to the nearest tenth of a percent. I did 64/160 = .4 so as a percentage that is 40% b. What

21. ## math

Suppose a radio active substance decays at a rate of 3.5% per hour. First write an exponential decay function that describes a quantity of radio active substance that starts at 100. Then determine how much is left after 6 hours? Round to the nearest

22. ## math

How do I find the x intercepts of the function f(x) = -6x^2 + 2700x - 63,750 I know the y has to = 0, but I'm not sure how to solve for x.... Thank you.

23. ## physics

if you use a horizontal force of 30 N to slide a 12 kg wooden crate across a floor at a constant velocity, what is the coefficient of kinetic friction between the crate and the floor?

24. ## physics

A 3.90 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=14.1N at an angle theta=32.5degrees above the horizontal, as shown. a.) What is the magnitude of the acceleration of the block when the force is applied?

25. ## Math

slope and y intercept form of these two problems? Y-5=1/3(x-9) 2y+6a-4x=0

26. ## Calculus

Solve the separable differential equation: dy/dt=4y^6 and find the particular solution satisfying the initial condition y(0)=-3 y(t)=?

27. ## chemistry

Under certain conditions, neon (Ne) gas diffuses at a rate of 4.5 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 10.1 centimeters per second. What is the approximate molar mass of the unknown gas?

28. ## Chemistry

hi! this question confuses me. "Pennies have mass of approximately 2.5 g. How many pennies are needed to make a mole of copper?" if anyone can help, that would be amazing.

29. ## Psychology

I am writing a paper and do not understand part of this question. The question is as stated: Describe the background, theoretical perspective, and contributions to the field of psychology of the person you have chosen. What is meant when I have to describe

30. ## English 4

I have a project due tomorrow and no matter HOW HARD I look I CANNOT FIND any quotes supporting the theme "painted faces" AND I have to document them with the page number!!! Can somebody please help me? I have to have atleast five. Any help would be

31. ## math

One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.

32. ## marketing

What is possibly the best indicator of a country's ability to use technology to leap several stages of economic development in a very short time? a. the quality of the educational system b. the general economic environment c. the size of the population d.

33. ## math

Inverse Variation I'm doing something wrong in my calculation but I can't figure out what -- The cost per person to rent a mountain cabin is inversely proportional to the number of people who share the rent. If the cost is \$36 per person when 5 people

34. ## math

Direct vs. Inverse Variation Also this one: You purchase a new SUV; as age increases, the resale price decreases. I believe this would be inverse, but the answer packet says neither direct nor inverse. As I understand inverse, as one value goes up, the

35. ## math

2p - 4p < _ -2 that is less than or equal to because I don't know how to make the symbol on my computer Then I get -2p < _ -2 Divide both sides by -2 to get p > _ 1 Is that correct, that when you divide by a negative number the sign changes direction??

36. ## math

I am asked to plot points on a coordinate system and then state what quadrant they are in. If I have a point such as (4,0), which is right on the line), what quadrant is that in? What about (0, -8)? That one is right on the line also. Thank you.

37. ## math

John is buying floor tile to put in a room that is 10 ft by 15 ft. He has chosen tiles that are 18 in by 18 in. Assuming that he needs to buy 10% extra to be safe, how many tiles would he need to buy. I know that I need to buy enough for 150 square feet,

38. ## math

Would you please help/check my answers on these probability questions because I cannot come up with what the answer book says. A group of baseball fans at a sports bar in Illinois were asked about which professional baseball team they root for during

39. ## Chemistry

How many moles of magnesium nitride form when 1.0 mole of magnesium reacts completely?

40. ## Health

1. In a soccer game, the coach of the home team realizes her players are not as highly skilled as the other team and she wishes to avoid a high scoring game which she believes her team will not win. How can she apply coaching tactics to give her team the

41. ## Health

At the mall, John and three of his friends are waiting for the movie to start. One of his friends has an older brother who says he can get them all into the movie for free if they go around to the back of the building and come in through the employee

42. ## math

The air pressure at sea level is generally about 1013 hPa (hectoPascals). For every kilometer that you go up in elevation, the air pressure decreases by 12%. Write an equation that describes the air pressure when the elevation is x kilmoeters above the sea

43. ## math

Find the initial amount given an exponential function. Given the equation y = 24(0.77)^t, what is the initial amount? To find the initial amount, I need to replace t with 0. When I do that, I get y = 24(0.77)^0 which is y = 24(1), so y = 24 In doing other

44. ## math

Hi, I'm trying to learn factoring but a couple of things don't make sense to me and I'm hoping you could explain them. If I have P(x) = 2(x-3)(x-4), how do I automatically know that the zeros are x = 3 and x =4? If inside the parentheses it was (x+3)(x+4),

45. ## math

When a situation can be modeled by a linear equation, what information do you need in order to find an equation?

46. ## math/stats

A hamburger chain found that 65% of all customers use mustard, when they buy hamburgers. If 5 customers randomly selected, what is the probability that none use mustard?

47. ## Math

1. What is the distance between the points (1, 4) and (4, 8)? I said Distance = 5 2. Find the slope between (1, 4) and (4, 8) I said 4/3 3. Are the expressions (4x+4)/4 and x+1 equivalent? I said Yes 4. Simplify (x+y)2 x2 + 2xy + y2 5. Is (x – y )2 = x2

48. ## physics

Block A (Mass = 2.319 kg) and Block B (Mass = 1.870 kg) are attached by a massless string as shown in the diagram. Block A sits on a horizontal tabletop. There is friction between the surface and Block A. The string passes over (you guessed it) a

49. ## Physics

A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize

50. ## Math

How do I solve this absolute value inequality? Should I add two to both sides first? | -3n | - 2 = 4

51. ## Math

What is 6x minus 6x? 0x or just 0?

52. ## English

I feel stupid for not knowing these but I can't figure it out! So in the sentence we have "underline the verb be (and its various forms) and decide how it's used. Circle the verb its helping or linking to and Write linking verb or helping verb on the line"

53. ## Chemistry

Calculate the mass of silver metal (Ag) produced from the reaction of 5.58 grams of copper metal (Cu) according to the following reaction: Cu(s) + 2AgNO3(aq) --> Cu(NO3)2(aq) + 2Ag(s)

54. ## geometry

the measure of x is greater than four times the measure of a supplement to it. is this possible? if so, graph the possibilities for c on a number line. if not, explain why not.

55. ## general chemistry

I've been trying to solve these for while now, and i keep getting them wrong.... please help!! A solution of NH4Cl hydrolyzes according to the equation. If the [NH3] in the solution after hydrolysis is 0.00000508 M, calculate the equilibrium concentration

56. ## Math

Using factoring to solve each quadriatic equation. 2x^2-5x-3=0. This is what I have so far but don't know what to do from here. GCF:1 A:2 B:-5 C:-3 AC:-6 Goal is the find two numbers that add to -5 and multiply to -6 Factors of 6: 1,6 -2,3 (That's the one)

57. ## math coordinate plane

A rectangle is plotted in the coordinate plane. The vertices (corners) of the rectangle are given as A(–2,3), B(4,3); C(–2, –2) and D(x,y). What is the ordered pair for point D?

58. ## calc

Integrate (1/2)^(3x+2)dx using substitution.

59. ## Social Studies

What are three countries in Eastasia?

60. ## science (density)

1) mass=100g, volume=10ml,density= 2) volume=7ml, mass=70g, density= 3) mass=50g, volume=10cm3, density= 4) volume=30cm3,mas=90g,density= 5) mass=120,volume=6ml,density= Thanks everyone i apresheate your help.

61. ## Human biology Coursework

On the net it has been suggested and my experiment it has been proven that Fructose can break down Vitamin C or atleast stop it from being effective in some way. I can not find ant theories on the net to how this breakdown happpens. As someone who has

62. ## math

Ok so i honestly have no idea what this is so if you could help me out it would be great!! Matthew will deposit \$500 into an account earning 6.25% simple interest. Bodie will deposit \$450 into an account earning 6.5% Compound interest. WHO has more money

63. ## Health

How do you ask for help for your mental health? My parents aren't really that accepting and I'm afraid of being casted out to a mental asylum, and called "crazy" like they've said before. I honestly don't know what to do.

64. ## Algebra

LOG2 (X+3)= LOG2 (4X-24) THANKS

65. ## math

What is the difference if a quadratic equation is set equal to 0 or to y? For example: y = x^2 - 8x + 15 OR x^2 - 6x - 16 = 0

66. ## math

We are given a table starting with year 1992 and going until year 2000. It says these are the closing prices for NASDAQ Stock Index at the end of February. There are three columns in the table - the year, x, and the price. By the year 1992, the first year,

67. ## math

I am working on a problem about bacteria growing and I used my calculator to find the exponential equation to be y = 10006.06771(1.2297)^x First it asked how many bacteria would there be after 6 hours which was easy because I just plugged in 6 for x and

68. ## math

Nikki is planting tomato plants in her garden. She has 20 feet along the back side where she plans to plant as many tomato plants as she can fit. The instructions specify to allow at least 20 inches between the holes where the plants will be planted.

69. ## math

When a soccer ball is drop-kicked into the air, the height h in feet of the ball after t seconds can be modeled by the quadratic function h(t) = -16t^2 + 32t + 4. a. When does the ball hit the ground? Round to the nearest thousandth of a second. I used the

70. ## math

(x - 5)(-.025x + 220) Is the answer -.025x^2 + 220x - 1100 OR -.025x^2 + 219.875x - 1100 I keep getting the first answer but in class the teacher said the answer was the second one and I'm getting frustrated because I can't get the second one!

71. ## math

The height of a sunflower being grown for a botany experiment can be modeled with a linear equation with variables y (height in cm) and x (days after measurements started). The line has slope 2.9. Two weeks after measurements started, the height was 49.1

72. ## math

I posted the question below last week and while it was answered, thank you, I am still unclear about my original question of how do I know what is considered the NEW value and what is considered the ORIGINAL value. I understand there is a change, yes, but

73. ## math

I am doing a project for math class and it is asking for the relative change. In our book, the formula is relative change = new value - original value/original value. The project is we look up nutritional values of items at a restaurant and then we have to

74. ## math

I am looking at an olympic event that has happened every 4 years (except for when the olympics didn't happen because of the wars). I found a line of best fit for this data and it is y = -0.0101x + 29.809 The questions are a) Does your graph have a

75. ## math

Would someone check this for me please because I'm a little confused. The height of a golf ball in meters can be described by the equation h = -4.9t^2 + 22.7t, where t is the number of seconds after it was hit. a) Find the vertex AND explain what each

76. ## math

Find the x-intercepts of the polynomial y = x^2 - 4x + 3 I'm not sure how to approach this -- do I first factor it and then my x intercepts are (#, 0)? So, for example, factored would be (x - 3)(x - 1) I set those equal to 0 so my x intercepts would be (3,

77. ## math

Hello, I am working on exponential equations of best fit. I have a table numbered from 1-7 with corresponding numbers. I put that into my calculator and came up with the exponential equation of best fit as y = 8.46(1.42)^x Now it wants to know how long it

78. ## math

Which equation is NOT an example of a direct variation? a. y = x b. 4x + 3y = 0 c. y = 5/4 x d. 2x + 6y = 0 Direct variation is y = kx The only one that can't be changed to become this is d. Is that correct?

79. ## math

Hi, Would you please check to see if I did this problem correctly? Your distance from lightning varies directly with the time it takes you to hear thunder. If you hear thunder 10 seconds after you see the lightning, you are about 2 miles from the

80. ## math

Hi, would you please check to see if I did this problem correctly? A recipe for 2 dozen corn muffins calls for 3 cups of flour. The number of muffins varies directly with the amount of flour you use. a. Write a direct variation equation for the

81. ## math

I had to look up a restaurant's nutrition information and pick an entree. Then the question says this: Assume that one serving of fat is approximately 5 g, one serving of protein is approximately 7 g, and one serving of carbohydrates is approximately 15 g.

82. ## math

Body mass index (BMI) is essentially a comparison between a person's weight and height. A BMI between 18.5 and 24.9 is considered healthy, over 25 is considered overweight, and over 30 is considered obese. How do you think a person's height varies with

83. ## math

How do I factor 9x^2 - 49? I believe this is a difference of squares, but I'm not sure how to do it with the 9 in front of the first term.......

84. ## math

How can you tell if a function is quadratic? Just if the highest power is 2? Are there any other ways?

85. ## math

If you're looking at a set of data, how can you tell whether a linear or exponential line of best fit would be most appropriate for the data?

86. ## math

What is the connection between the solutions of the equation ax^2 + bx + c = 0 and the x intercepts of the graph f(x) = ax^2 + bx + c? I'm confused here - aren't they the same thing except one is the equation of a quadratic equation and one is a graph? So

87. ## math

I'm trying to multiply this and keep getting the wrong answer: (x - 5)(-0.025x + 220) I have used the FOIL method and I have multiplied (x - 5) -0.025x and then multiplied (x - 5) 220. Both methods I get the same answer. But... the answer book and the

88. ## math

Try as I might, I just don't understand the difference between inductive and deductive reasoning. I have tried reading about it and they keep talking about general and specific things but I just don't get it. Is there an easy, lay way to explain it so I

89. ## math

What is the difference between the correlation coefficient and residuals when talking about the line of best fit? With the correlation coefficient, I know you want your number to be close to 1 or -1. So when talking about residuals, what is considered a

90. ## math

I am learning about lines of best fit and how to do them on my calculator. I found the correct equation and now I need to find predicted values for x. I have all my x values and I have my equation. Do I need to do each of these manually on my calculator,

91. ## math

I have to answer the question: "why are inequalities a more realistic way to model situations than equations" and am having trouble with this. One reason I thought about is because inequalities are more applicable to real life situations. But other than

92. ## math

Write the equation of the line that passes through the points (3, -2) and (-2, 8) using the slope-intercept form. My slope is -2 So if I substitute in one of the points, -2 = -2(3) + b -2 = -6 + b Add 6 to both sides and b = 4 So my equation is: y = -2x +

93. ## math

I am to solve this inequality: 2/3x < -12 I multiplied both sides by 3/2 to get x < -12(3/2) x < -18 But the answer shows x < -9 What have I done wrong?

94. ## math

I need to recreate a graph in Excel but don't know how to get started. I know how to make graphs in Excel, that's not the problem, I just don't know how to do this one. I can see the what this one is supposed to look like, and from the answers, there are

95. ## math

When writing an equation in point-slope format, is it not proper to fully solve for y? For example, here is my problem: Find the point-slope equation for a line containing the point (-7, 2) and the slope m = 3. The answer was this: y – 2 = 3(x + 7) I was

96. ## math

I need to solve a literal equation -- Solve for h: A = 1/2bh If I divide both sides by 2b, then my answer would be h = A/2b Is this correct?

97. ## math

Why does an account with linear growth and a steady increase of \$700 each month have a changing relative difference while an account with exponential growth and a steady 3% increase each month have a steady relative difference of 5% each month?

98. ## math

I know that theoretical probability observes how may outcomes are possible and assumes that each outcome is as likely as any other to occur and empirical probability is based on actual facts or experiments. So theoretical is what we expect to happen and

99. ## math

One of the guest rooms in my house has two walls that are 15'6" by 8 ft, and two that are 12'3" by 8 ft. When buying paint for the walls, I estimated the wall area to be about 450 sq. ft. Find my percent area. First I need to find the total area of the