pre-algebra

Most popular questions
1. Pre-Algebra

1) Find the surface area for a sphere with a radius of 10 feet. Round to the nearest whole number. a. 1,256 ft2 b. 4,189 ft2 c. 1,089 ft2 d. 1,568 ft2 2) Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. a. 1,257 ft3

asked by Alexa on March 13, 2013
2. Pre-Algebra

1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54 b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the mode

asked by Janessa on March 20, 2013
3. Pre-Algebra

What do they call the International Hula Hoop Championships?

asked by Mikayla on September 15, 2009
4. Pre-Algebra

A back-to-back stem-and-leaf plot showing the points scored by each player on two different basketball teams is shown below. What is the median number of points scored for each team?

asked by Anonymous on April 16, 2013
5. Pre-Algebra

1. Given the function rule f(x) = x² – 3x + 2, what is the output of f(–2)? 2. Suppose you earn \$12 each time you mow the lawn. Write the function describes the relationship between your total earnings E and the number of times you mow the lawn, m? 3.

asked by Anonymous on May 12, 2015
6. Pre-algebra

Which expressions are equal to 120 Multiple chose 1. 5! 2. 6! 3. 6p3 4. 12p10 I think the answers are 5! and 6p3

asked by Gloria on March 9, 2016
7. Pre-algebra

4.A car traveling 23 mi/h accelerates to 46 mi/h and 5 Seconds.It maintains that speed for 5 seconds and then slows to a stop in 5 seconds which graph shows the car speed over time?

asked by Bebe on May 31, 2018
8. Pre-Algebra

For questions 2 and 3, simplify the polynomial. 2. 2x^2+8-4x+3x-6x^2+7 a.-8x^r-7x+15 b.-4x^2-x+15 c.4x^2+x+15 d.8x^2+7x+15

asked by Richy305 on June 2, 2015
9. Pre-Algebra

1. Write the fraction 8/9 as a percent. Round to the nearest hundredth of a percent where necessary. A. 88.89% B. 1.13% C. 44.44% D. 66.67% 2. Write 0.063 as a percent. A. 0.63% B. 6.3% C. 63% D. 630% 3. A study in your town found that 54 in 1,762 people

10. Pre-Algebra

1. Which polynomial does the model represent? (One big black square, two white rectangles, one black rectangle, one white cube, and three black cubes.) This is all I need. @Mrs. Sue @Reed

asked by Plz Help on May 11, 2017
11. pre-algebra

Justin wants to use 376 ft of fencing to fence off the greatest possible rectangular area for a garden. What dimensions should he use? What will be the area of the garden? A. 89 x 99; 8811 ft B. 92 x 96; 8832 ft C. 94 x 94; 8836 ft D. 93 x 95; 8835 ft

asked by heather on July 26, 2017
12. Pre-Algebra

8. Mark needs to cut a piece of glass to replace a broken window. He has four pieces of glass: 6 feet long, 5 feet long, 3 feet long, and 7 feet long. If the length of the glass he needs to cut is square root 20 feet long, which piece of glass should he

asked by Lelolel on September 26, 2017
13. Pre-Algebra

Jamal writes the letters K-A-N-S-A-S on cards and then places the cards in a hat. What is the probability an N? 1/3 1/5 5/1*** 6/1 Jennifer writes the letters M-O-N-T-A-N-A on a cards and then places the cards in a hat. what is probability of picking an N?

asked by Joe:) on May 10, 2018
14. Pre-Algebra

A survey about the student government program at a school finds the following results: 190 students like the program 135 students think the program is unnecessary 220 students plan on running for student government next year. If a circle graph were made

asked by Tay-K's Shoota on March 14, 2018
15. Pre-Algebra

What is the length of the diagonal for the rectangular prism to the nearest whole unit? LENGTH:12 cm WIDTH:4 cm HEIGHT:9 cm A.16 cm B.15 cm C.13 cm D.10 cm i thinks its c. i think...

asked by bruh on March 5, 2015
16. Pre-Algebra

1.Write the ratio in the simplest form 45:15 9:3 3:1*** 1:3 4:1 2.Solve the following proportion p/6 =7/8 p=5.25*** p=8 p-10.5 p=42 3.James has a model helicopter. The model is 8 inches long and 7 inches wide. The actual helicopter is 56 inches long. What

asked by Cami on November 22, 2015
17. Pre-Algebra

A right triangle has an area of 21 m2. The dimensions of the triangle are increased by a scale factor of 4. What is the area of the new triangle? A. 42 m2 B. 84 m2 C. 168 m2 D. 336 m2 How would I solve this?

asked by BruteForce on October 24, 2017
18. Pre-Algebra

The cones below are similar, although not drawn to scale. What is the length of the radius of the larger cone? The height of the smaller cone is 18 and the radius is 6. The height of the larger cone is 27 and the radius is unknown. A- 4 B- 6 C- 9 D- 12

asked by GymnasticsLover05 on February 2, 2019
19. Pre-Algebra

The width of a picture is 20 cm. Using a color copier, you reduce the width of the picture to 5 cm. What is the scale factor of the dilation? A)5 B)1/5 C)4 D)1/4*****

asked by Chubby Gerbal on December 10, 2016
20. Pre-Algebra

Write a rule for the linear function in the table. x f(x) –4 16 0 0 4 –16 8 –32 A. f(x) = –4x B. f(x) = x + 16 C. f(x) = 4x D. f(x) = x

asked by nay nay on April 11, 2012
21. pre-algebra

a bag contains 5 green marbles 2 white marbles 8 blue marbles 9 red marbles and 6 black marbles what is the probability of drawing a white marble replacing it and then drawing a green marble? Answer choices A 1/6 B 1/15 C 1/87 D 1/90 I think its D, but I

asked by Bob on February 17, 2011
22. Pre-algebra

Use a proportion to solve the problem. 34% of 83 x/100=34/83;40.96 x/100=34/83;2.822 x/83=34/100;28.22 x/83=34/100;56.44 I think it's either c or d because a and b arn't set up correctly according to how you're supposed to set up a porportion.

asked by Hi!!!! on December 9, 2017
23. Pre-algebra

The ramp shown below is used to move crates of oranges to loading docks at different heights. When the horizontal distance AB is 15ft, the height of the loading dock, BC, is 3ft. What is the height of the loading dock DE? -5 -8 -9 -25 My answer: 5 Diagram:

asked by R5er15 on November 6, 2016
24. pre-algebra

Directions: Follow the instructions below to design a fair race for the new video game Animal Tracks. 1. Choose two animals with different speeds. You can choose from the chart that starts at the bottom of this page or do research to choose your own. 2.

asked by _kylee17_ on May 2, 2016
25. Pre-Algebra

Here's the instructions for my portfolio: 1. Choose two animals with different speeds. You can choose fro m the chart that starts at the bottom of this page or do research to choose your own. 2. Design a fair race in which the two animals have an equal

asked by TotallyLost on May 3, 2017
26. Pre-Algebra

The grocery store sells kumquats for \$4.25 a pound and Asian pears for \$2 a pound. Write an equation in standard form for the weights of kumquats k and Asian pears p that a customer could buy with \$12.

asked by Jessica on April 25, 2012
27. Pre-Algebra

The sum of their ages. is 97. The difference of their ages is 19. Find their ages.

asked by Nia on April 7, 2017
28. Pre-Algebra

How many different ways can you choose 3 frozen yogurt toppings from 20? 6,840 1,140 60* 2,260 I think it is 60 because 3*20 however not positive.

asked by Kate on April 1, 2013
29. pre-algebra

Would someone please reword this? Note: Remember to show all of the steps that you use to solve the problem. Be sure to use the text box where the question mark (?) first appears to show your mathematical work. You can use the comments field to explain

asked by BleakTuber on December 6, 2018
30. Pre-Algebra

Identify the underlined place in 83.5851. Then round the number to that place. A. thousandths; 83.58 B. hundredths; 83.59 C. hundredths; 83.58 D. thousandths; 83.59 A?

31. Pre-Algebra

The ratio of men to women at a lecture is 2 to 5. A total of 63 people are at the lecture. How many are men? Explain how you found your answer,

asked by Penelope on January 9, 2014
32. Pre-Algebra

1. 16x^2 + 2 + 2x - 15x^2 - 1 + 14x A. 31x^2 + 16x + 1 B. x^2 - 12x + 1 **** C. x^2 + 16x + 1 D. x^2 + 16x + 2 2. 2x^2 + 8 - 4x + 3x - 6x^2 + 7 A. -8x^2 - 7x + 15 B. -4x^2 - x + 15 **** C. 4x^2 + x + 15 D. 8x^2 + 7x + 15 3. 4x^2 + 8x - 11x + 6 - 5x^2 + 2

asked by Help ASAP on May 10, 2018
33. Pre-Algebra

Grade 7 students were surveyed to determine how many hours per day they spent on various activities. Eating is 8%, homework is 8%, sleeping is 33%, TV is 13%, socializing 13%, and school is 25%. About how many hours per day altogether were spent on

asked by OMGSPOOKYANONYMOUS on March 5, 2013
34. Pre-Algebra

The layer cake has both vanilla and chocolate frosting. What percent of the surface area of the cake (not including the bottom) is chocolate? Round your answer to the nearest tenth of a percent.

asked by Anonymous on March 21, 2016
35. Pre-Algebra

A bag contains 10 white golf balls and 6 striped golf balls. A golfer wants to add 112 golf balls to the bag. He wants the ratio of white to striped golf balls to remain the same. How many of each should he add?

asked by Joe on November 14, 2012
36. Pre-Algebra

At a halftime show a marching band marched in formation. The lead drummer started at a point with coordinates (-2,-5) and moved three steps up and 1 step right. Write a rule to describe the translation. What were the coordinates of the drummers final

asked by Drew on September 28, 2015
37. Pre-Algebra

Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets of values. My Answer: B) two sets of values.

asked by Wendy on March 25, 2013
38. Pre-Algebra

Sally puts \$200.00 in a bank account. This account earns 8% compound interest. How much money is in the account after three years? A \$151.94 B \$240.00 C \$251.94 D \$160.00 I really need help on how to solve this, I tried all the stuff I learned this unit,

39. pre-algebra

A submarine at the surface dives 375 ft and then another 175 ft. Express the final depth as an integer. A. –525 ft B. –550 ft C. 550 ft D. 525 ft C?

40. Pre-Algebra

Is this correct? Which of the following best describes every parallelogram? A. a quadrilateral with only one pair of congruent sides B. a quadrilateral with only one pair of congruent angles C. a quadrilateral with both pairs of opposite sides parallel D.

asked by mysterychicken on May 26, 2009
41. Pre-algebra

What is the distance between points A and E A.2.8 B.3.2 C.4.9 D.5.7

asked by Bobblue on October 16, 2017
42. Pre-Algebra

Use the Associative Property of Addition to find the total of 1, 10, and 18 in two different ways. A. 1 + 10 + 18 = 11 + 18 = 29; 10 + 18 + 1 = 28 + 1 = 29 B. 1 + 10 + 18 = 11 + 18 = 29; 18 + 10 + 1 = 28 + 1 = 29 C. (1 + 10) + 18 = 11 + 18 = 29; 1 + (10 +

43. Pre-Algebra

Two urns each contain green balls and blue balls. Urn I contains 4 green balls and 6 blue balls, and Urn II contains 6 green balls and 2 blue balls. A ball is drawn at random from each urn. What is the probability that both balls are blue? A. 2/15 B. 3/20

asked by Dakota on November 5, 2015
44. Pre-algebra

Dwayne walks a total of 960 feet around 3 sides of a square city block. Which equation and solution show a correct way to find the perimeter, P, of the block?

asked by Leigha on October 24, 2014
45. pre-algebra

You split \$1500 between two savings accounts. Account A pays annual 5% interest and Account B pays 4% annual interest. After one year,you have earned a total of \$69.50 in interest. How much money did you invest in each account?

asked by em on January 24, 2013
46. pre-algebra

write an inequality for the sentence. The total t is greater than five. Well your answer is going to be T and the sign for greater than is simply >. So the answer would be T > 5 ok again my name is above. i was just wondering what pre-algebra was? i mean i

asked by Joe on March 9, 2007
47. Pre-Algebra

One hundred nautical miles equals about 185 kilometers. To the nearest kilometer, how far in kilometers is 290 nautical miles?

asked by Anonymous on December 13, 2012
48. Pre-Algebra

Write the given sentence as an equation. Tim's age in 7 years will be three times what it was 19 years ago.

asked by Amy on March 4, 2013
49. Pre-Algebra

A radio signal travels at 3.00*10^8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.54*10^7?

asked by Ava on May 2, 2017
50. pre-algebra

Use the figure to answer the following questions. figure for questions 1–3 1. Name a pair of complementary angles. (1 point) angle sign1 and angle sign4 angle sign1 and angle sign2 angle sign3 and angle sign4 angle sign1 and angle sign6 2. If mangle

asked by cupcakesss on February 26, 2016
51. Pre-Algebra

The lunch special at Jimmy John’s costs \$5.60. The math club has \$50.40 in its treasury. How many lunch specials can the club buy? Write and solve an inequality. Show your work. i know that regularly you would just divide 50.40 by 5.60 but to display it

asked by Woltia on December 14, 2018
52. PRE-ALGEBRA

asked by BRITTANY on January 18, 2013
53. Pre-Algebra

1.) if m

asked by Dylan on February 23, 2015
54. pre-algebra

kk my teach told me to describe and draw things that are about pre-algebra and she told me to write what pre-algebra is... so can anyone help me??

asked by damainmind on August 25, 2008
55. Pre-Algebra

A bag contains 10 white golf balls and 6 striped golf balls. A golfer wants to add 112 golf balls to the bag. He wants the ratio of white to striped golf balls to remain the same. How many of each should he add?

asked by Anonymous on November 14, 2012
56. Pre-Algebra

List three different ways to write 511 as the product of two powers

asked by Sue on May 25, 2017
57. Pre-Algebra

What association would you expect if graphing height and weight?

58. Pre-Algebra

9. During the basketball season, Diane took 134 shots and made about 56% of them. a. How many shots did Diane make? b. The team made a total of 498 shots. What percent of the team's made shots did Diane make? A. 24 shots; 15.1% B. 753 shots; 27% C. 240

asked by Help me! on December 14, 2017
59. Pre-Algebra

1) Find the surface area for a sphere with a radius of 10 feet. Round to the nearest whole number. a. 1,256 ft2 b. 4,189 ft2 c. 1,089 ft2 d. 1,568 ft2 2) Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. a. 1,257 ft3

asked by Destiny on March 12, 2013
60. Pre-Algebra

1. What makes the statement true? 8^-2 =? A. 64 B. 16 C. -1/64 D. 1/64 2. What is the solution to (4 x 10^3) x (6 x 10^6), written in a scientific notation? A. 24 x 10^9 B. 2.4 x 10^9 C. 24 x 10^18 D. 2.4 x 10^10 3. What is 0.000000512 written in a

asked by Lilith on September 30, 2015
61. PRE-ALGEBRA

1. 5h – 9 = –16 + 6h (1 point) 4 –7 7 10 2. 4x + 4 = 9x – 36 (1 point) –8 –7 8 –3 3. Which of the following equations has an infinite number of solutions? (1 point) 3x – 3 = –4x 2y + 4 – y = 16 7x + 5 = 4x + 5 + 3x 6y – 2 = 2(y – 1)

62. pre-algebra

The number of cells in a lab sample triples every 4 hours. Write an expression to represent the number of cells after 24 hours. I think it might be x cubed times 6

asked by Dana on November 5, 2014
63. pre-algebra

Which statement is false? A. Every integer is a real number.**** B. The number zero is a rational number. C. Every irrational number is a real number. D. Every real number is a rational number.

asked by BleakTuber on November 29, 2018
64. Pre-Algebra

1.)Identify the underlined place in the decimal number 83.5 8 41.Round the number to that place. a.)thousandths;83.58 b.)hundredths;83.59 c.)hundredths;83.58 d.)thousandths;83.59 2.)Estimate \$5.56 + \$13.02 using front-end estimation. a.)about \$19.60

asked by Gabriella on October 29, 2014
65. Pre-Algebra

Find the volume of the rectangular prism? A-23in3 B-297in3 C-318in3 D-159in3 Find the volume of the triangular prism? A-23in3 B-297in3 C-318in3 D-159in3 Find the volume cylinder. A-16,990mm3 B-8,491mm3 C-4,247 D-2,369mm3 Find the volume of a cylinder with

asked by Octavia on March 6, 2018
66. Pre-Algebra

Your baseball team has won 6 games and lost 4 games. If the team does not lose any more games, how many games must the team win to have a win: loss ratio of 2:1.

asked by Jackie on February 24, 2014
67. Pre-Algebra

The length of an Olympic-size pool is 50 meters. If x represents the width of one lane, what is the area of a pool with five lanes?

asked by Katie on May 20, 2019
68. pre-algebra

The coordinates of quadrilateral VWXY are given below. Find the coordinates of its image after a dilation with the given scale factor. V(6, 2), W(–2, 4), X(–3, –2), Y(3, –5), scale factor of 2

asked by BleakTuber on December 12, 2018
69. Pre-Algebra

What association would you expect if graphing height and weight? (1 point) positive nonlinear negative none of these

asked by TheFriendlyUnicorn on March 4, 2013
70. Pre-Algebra

The coordinates of quadrilateral VWXY are given below. Find the coordinates of its image after a dilation with the given scale factor. V (6, 2) W (-2, 4) X (-3, -2) Y (3, -5) scale factor of 2

asked by Nicky on October 27, 2015
71. Pre-Algebra

You put the names of all the students in your class in a paper bag. There are 19 boys and 12 girls. If you draw a name at random, what is P(boy’s name)? A.19/20** B.19/31 C.12/19

asked by 20four on April 11, 2019
72. Pre-Algebra

For numbers 1–3, find the indicated measurement of the figure described. Use 3.14 for (pi) and round to the nearest whole number. 1) Find the surface area of a sphere with a radius of 8 cm. a. 268 cm2 b. 804 cm2 c. 2,144 cm2 d. 201 cm2 2) Find the

asked by Selena on March 13, 2013
73. Pre-Algebra

If a ping pong ball falls from the top of a building that is 168 feet high, how many seconds will it take the ball to hit the ground? Remember, the formula for distance is d = 16t^2. 1 3.2 10.5 16

asked by Anonymous on October 1, 2012
74. Pre-Algebra

How many total blocks would be needed to build the model for the given base plan?       a) 5 b) 11 c) 6 d) 12

75. pre-algebra

I'm having a hard time with coming up with equations. Here's an example: Complete the equation of the line through (−8,−2)and (−4,6) Could anyone solve this and explain (as simple as possible) how you came up with the answer? I'm sorry if this was a

asked by killjoy on May 16, 2019
76. pre-algebra

1.write the fraction 5/6 as a percent. Round to the nearest hundredth of a percent where necessary. 33.33% 66.67% 83.33% 1.20% 2. Chris and five of his friends go out to dinner. The total bill comes to \$124.29. they decide to leave a 20% tip. Each person

asked by kelsey on November 14, 2013
77. Pre-Algebra

Can U Just Check My Answer Please! Thank You Guys :D Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets

asked by Sammy on March 25, 2013
78. pre-algebra

the scale on a map is 1 cm: 7 km. if two cities are 15 cm apart on a map, what is the actual distance in the cities?

asked by daniel on December 5, 2018
79. Pre-Algebra

Can U Just Check My Answer Please! Thank You Guys :D Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets

asked by Sammy on March 25, 2013
80. Pre-Algebra

Which of the following examples would show a negative trend? height and weight of students test scores and height of students outside temperature and heating bill none of these

asked by TasteTheRainbow on February 28, 2013
81. Pre-algebra

Suppose y=2x-2.5. Find x if y=10

asked by Smile on May 21, 2012
82. Pre-Algebra

Suppose you roll two number cubes and pick a letter of the alphabet at random. Find the probability you roll 2 even numbers and pick one of the vowels a, e, i, o, or u. A. 7/104 B. 5/104 C. 1/6 D. 1/104

asked by Dakota on November 5, 2015
83. pre-algebra

diameter of the atomic nucleus of a lead atom is 1.75 x 10^-10

asked by jemina on October 1, 2015
84. Pre-Algebra

Martha is in a hot air balloon that has risen straight up from the launch point. Matthew is standing on the ground, 16 meters away from the launch point. If Martha and Matthew are 20 meters apart, how high has the balloon risen? A. 4 meters B. 12 meters C.

asked by Alice on April 17, 2017
85. Pre-Algebra

He said it to his sisters, he said it to his brothers, what did the witty raindrop elclaim to all the others?

asked by Elise Baker on February 13, 2017
86. Pre-Algebra

If y varies directly with x, find the constant of variation with x = 4 and y = -24 If y varies inversely with x, find the constant of variation with x=5 and y = 10 If y varies directly with x, and y = 35 when x = 5 , find x when y = -7 If y varies directly

asked by Anon on June 7, 2015
87. Pre-algebra

I am doing corrections and I have no idea how to do this problem. A right triangle has an area of 13 m2. The dimensions of the triangle are increased by a scale factor of 3. What is the area of the new triangle?

asked by Kathleen 2018 on November 14, 2018
88. Pre-algebra

There are eight sprinters competing for first, second, and third place ribbons. How many different ways can the ribbons be awarded?

asked by Alena on May 23, 2011
89. Pre-Algebra

A jar contains 45 red candies and 60 black candies. Suppose a candy is selected at random. What are the odds against selecting a red candy? 3 to 7 4 to 3 4 to 7 can someone show me how to find the correct answer (Not the answer) but the steps ?!!!

asked by 20four on April 11, 2019
90. Pre-Algebra

Use the function rule f(x) = 3x - 2. Find the output f(1.5). a. 2.5 b. -2.5 c. 6.5 d. -6.5 I think it's a but I'm not sure.

asked by Anonymous on February 22, 2019
91. pre-algebra

Use algebra tiles to find the difference. Let one white tile equal +1 and one black tile equal –1.

asked by nay nay on April 5, 2012
92. Pre-Algebra

Find the regular price. Round the nearest cent. Sale Price:\$56.78 Percent Discount: 40% \$141.95 \$96.78. \$79.49 \$94.63

asked by Hi!!! on December 9, 2017
93. Pre-Algebra

If Dave drives t a steady speed of 50 miles per hour, how long will take him to drive 10 miles?

asked by Mika on December 31, 2018
94. PRE-Algebra

Water tank A has a capacity of 550 gallons and is 66% full. Water tank B is 53% full. The ratio of the capacity of Tank A to Tank B is 11:15. what is the capacity of tank B?

asked by Gorge on February 18, 2014
95. Pre-Algebra

Hi I usually don't ask questions, so if ya'll could just help me with this one. (You don't have to give me the answer, just tell me how to do it) 4. What are the coefficients in the polynomial 5x^2+2x-4? A. 5, 2 B. -5, -2 C. 5, 2, -4 D. 5, -2, -4 Thanks!

asked by Ya'llMakeMeFacePalm._. on April 26, 2019
96. Pre-Algebra

On a school field trip, the school requires that there are 3 teachers for every 75 students. If 125 students attend the trip how many teachers are needed? Write and solve a proportion. Triangle CAT is located at C (-5, 2), A (-4, 4), T (-1, 2). Find the

asked by Woltia on November 7, 2018
97. Pre-Algebra

problem: Dena borrowed \$7500 to buy a used car. The credit union charged 9%(percent it looks kind of funny) simple intrest per year. She paid \$2025 in interest. For what period of time did she borrow the money. It would be 3 years. Get how much they charge

asked by Lindsey on February 5, 2007
98. pre-algebra

An estimate for negative Square Root 66 is _____. A. – 6 B. – 7 C. – 8 D. – 9

asked by BleakTuber on December 7, 2018
99. Pre-Algebra

You drop a rock off a bridge. The rock's height, h(in feet above the water), after t seconds is modeled by h=-16t2+541. What is the height of the rock after 2 seconds?

asked by Amy on March 4, 2013