# A model rocket is launched from a roof of a building. Its path is described by the relationship h=-5t*2+35t+10, where h is the height in metres and t is the time in seconds. How tall is the building? What is

13,356 questions, page 20
1. ## physics

A 45 m/s (100 mph) wind blows across the top of a flat-roofed house. Calculate the net force on the roof due to the pressure differential from inside the house to the outside. Assume that the pressure in the house is atmospheric pressure and that the roof

2. ## Math

A garden is measuring 12m by 16m is to have a path around it, increasing the total area to 285 square metre. what is the width of the path? I went like that (16+2x).(12+2x)= 285 4x^2+56x-93=0 I am stuck now

asked by Natasha on December 11, 2018
3. ## math

a rectangular garden 30 m by 40 m has two paths of equal width crossing through it as shown. Find the width of each path if the total area covered by the path is 325 M^2 (m squared) help

asked by sam on December 4, 2007
4. ## Physics

A Van de Graaff generator is a device for generating a large electric potential by building up charge on a hollow metal sphere. A typical classroom-demonstration model has a diameter of 30 cm. How much charge is needed on the sphere for its potential to be

asked by MMM on April 1, 2015
5. ## math

A vertical mast is on top of building and is positioned 6 ft from the front edge. The mast casts a shadow perpendicular to the front of the building and the tip of the shadow is 90 ft from the front of the building. At the same time, the 24 ft building

asked by John on April 1, 2017
6. ## Physics

My midterm is tomorrow and I have a couple questions that I need to study. Ive tried and tried and cannot figure these out. 1) A ball is dropped from a roof and takes 3.0s to reach the ground. Calculate the elevation of the roof above the ground in meters.

asked by Mike on January 16, 2008
7. ## physics

A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 49.0 . The acceleration period lasts for time 10.0 until the fuel is exhausted. After that, the rocket is in free fall. What's the max height?

asked by Uzz on September 28, 2011
8. ## physics

Hypothetically a pebble rolls off the roof edge of Golden Eagle Arena and falls vertically. Just before it reaches the ground, the pebble's speed is 17 m/s. Neglect air resistance and determine the height of Golden Eagle Arena's roof edge.

asked by Anonymous on October 13, 2012
9. ## physics

Hypothetically a pebble rolls off the roof edge of Golden Eagle Arena and falls vertically. Just before it reaches the ground, the pebble's speed is 17 m/s. Neglect air resistance and determine the height of Golden Eagle Arena's roof edge.

asked by Anonymous on October 13, 2012
10. ## calculus

A fence 4 feet tall runs parallel to a tall building at a distance of 5 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by zama on November 8, 2009
11. ## Calculus

A fence 6 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by Pete on July 13, 2010
12. ## Calculus

A fence 3 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by Alessandra on November 5, 2014
13. ## calculus

A fence 5 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by sonia on November 21, 2012
14. ## Calc

A fence 5 feet tall runs parallel to a tall building at a distance of 5 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by Manny on April 5, 2009
15. ## Math: Calculus

A fence 6 feet tall runs parallel to a tall building at a distance of 2 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by REALLY NEED HELP!!!! on October 29, 2010
16. ## Calculus

A fence 8 feet tall runs parallel to a tall building at a distance of 6 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by JAY Z on April 30, 2014
17. ## Calculus

A fence 2 feet tall runs parallel to a tall building at a distance of 6 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by Anonymous on October 28, 2011
18. ## physics

a person was climbing on a building.he slips 1 metre for every 5 metre he climb up. if the building is 53 metre high and he takes 5 seconds to climb 1 metre,find the total time taken by him to get on the top of the building.

asked by Anonymous on April 9, 2014
19. ## Math

A fence 4 feet tall runs parallel to a tall building at a distance of 2 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by Salman on November 7, 2009
20. ## Calculus

A fence 4 feet tall runs parallel to a tall building at a distance of 6 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by Anonymous on October 28, 2011

A fence 2 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building? Help!

asked by Anonymous on August 8, 2013
22. ## Calculus

fence 3 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by Anonymous on November 6, 2014
23. ## calculus

A fence 5 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by sonia on November 21, 2012
24. ## Calculus

A fence 6 feet tall runs parallel to a tall building at a distance of 20 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by Ashlyn on April 22, 2018
25. ## Math

A fence 3 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by Anonymous on March 21, 2017
26. ## Calculus

A fence 4 feet tall runs parallel to a tall building at a distance of 2 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

asked by Anonymous on April 20, 2015
27. ## Physics

A tunnel of length L = 141 m, height H = 6.9 m high, and width 6.0 m (with a flat roof) is to be constructed at distance d = 60 m beneath the ground. The tunnel roof is to be supported entirely by square steel columns, each with a cross-sectional area of

asked by Ray on November 3, 2009
28. ## Algebra

The length of a shadow of a building is 27 meters. The distance from the top of the building to the tip of the shadow is 38 meters. what is the height of the building?

asked by William McKeithan on December 15, 2016
29. ## Geometry

A 10-meter ladder, is resting against the top of a building. If the bottom of the ladder is 4 meters from the building, how many meters tall is the building

asked by Terrence on June 3, 2011
30. ## physics

A worker on a roof, 20.8 m above the ground, wants to drop a brick onto the back of a moving truck. The truck is moving at a constant velocity of 5.0 m/s alongside the building. The back of the truck is 1.2 m above the ground. How far from the point of

asked by Anonymous on April 17, 2019
31. ## English

Thoreau included the following sentence in Walden: "There is some of the same fitness in a man's building his own house that there is in a bird's building its own nest." Which of the following statements rephrases his literal comparison as a metaphor? A. A

asked by Sam on November 14, 2014
32. ## IT

Why is the waterfall model valuable in the management of information technology projects? Refer to "Arguments for the Waterfall Model" in http://en.wikipedia.org/wiki/Waterfall_model The waterfall model is a sequential software development model (a process

asked by Maria on February 28, 2007
33. ## Physics

A rock is thrown vertically upward with a speed of 11.0 m/s from the roof of a building that is 70.0 m above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? GOT THIS!!!! t=5.07s What is the speed of the

asked by Josh on September 11, 2006
34. ## religions

i need to make a model of any famous mosque in the world first, i need help finding pictures of different mosques to see which one would be easy to work with (i need a nice picture, maybe 3D, so i can copy it and build my model according to it) second, i

asked by y912f on May 12, 2009
35. ## Physics

Develop a model for the effective gas mileage (call it E) as a function of speed (S) for a ¡°typical¡± car (you should be able to find the necessary information to develop this model for your own car). This model should be valid for 55 ¡Ü S ¡Ü75

asked by Henry on March 4, 2013
36. ## Physics

Santa Claus (mass = 150 kg) is leaning his sled(mass = 50 kg, length = 6 m) at an angle of 72° against the wall of the house to enter from the roof the living room. Considering a coefficient of friction of 0.29 between the ground and the sled and no

asked by Chika on December 4, 2016
37. ## English

Thoreau included the following sentence in Walden: "There is some of the same fitness in a man's building his own house that there is in a bird's building its own nest." Which of the following statements rephrases his literal comparison as a metaphor? A. A

asked by LaH on October 24, 2011
38. ## math

the white house built 1792 is the oldest federal building in washington dc the building has undergone extensive remodeling over years the main building is four stories high and is about 170 ft long by ft wide if a replica of the white house were made with

asked by Franklin bash on December 11, 2011
39. ## Math

The white house, built 1792, is the oldest federal building in washington DC . The building has undergone extensive remodeling over the years. The main building is 4 stories high and is about 170 ft long by 85 ft wide. If a replica of the white house were

asked by Nick on January 29, 2014
40. ## Geometry

John places a mirror on the ground between himself and an apartment building. He then stands so that he can see the top edge of the building in the center of the mirror. The center of the mirror is 6.10 meters from her feet and 18.30 meters from the

asked by Jenny on June 27, 2011
41. ## Math

there is a path 7 meter wide outside around the square playground of side 60 meter each. find the area of the path...........?

asked by J.B. on December 11, 2011
42. ## physics

A ball is thrown straight up in the air A) What is its velocity at the top of its path? B) What is acceleration at the top of its path

asked by lisa on May 3, 2012
43. ## maths

If the lawn is 20xY metres and the path around the garden is 2 metres wide, what is the expression for the area of the path?

asked by me on November 7, 2015
44. ## Maths

A model of a ship is made to a scale of 1:160 find the length of the ship if the length of its model is 1.2m, tthe area of deck of the ship if the area of deck of its model is 1.2m square,the volume of the ship if the volume of its model is 1.2m cube

asked by Soju on December 27, 2017
45. ## math

a ladder is leaning againt the side of a building. The ladder is 10 feet away from the building and touches the building at a point 24 feet above the base. How long is the ladder?

asked by mary ann on March 7, 2012

the coefficient of static friction between the coffee cup and the roof of a car is 0.28, If the maximum acceleration the car can have without causing a cup of coffee (on the top of the car) to slide is 2.7 m/s^. What is the smallest amount of time in which

asked by Casey on January 5, 2012

the coefficient of static friction between the coffee cup and the roof of a car is 0.28, If the maximum acceleration the car can have without causing a cup of coffee (on the top of the car) to slide is 2.7 m/s^. What is the smallest amount of time in which

asked by Casey on January 5, 2012

we have a trebuchet. if the arm of the trebuchet fires in a circular motion with a radius of 2.0 m and the mass is 50kg on the other end of the arm. what will the speed of the 4 kg boulder be as it is launched into the air? assuming it is launched parallel

asked by s.r on November 10, 2011

we have a trebuchet. if the arm of the trebuchet fires in a circular motion with a radius of 2.0 m and the mass is 50kg on the other end of the arm. what will the speed of the 4 kg boulder be as it is launched into the air? assuming it is launched parallel

asked by s.r on November 10, 2011
50. ## Algebra

In the old days there were elevator operators to transport passengers. Don Downs always started his day in the basement. He went up 20 floors to take his boss some coffee. Then he went down 8 floors to take a donut to his friend. He went up 7 floors to

asked by samay on January 26, 2018

You see a firefighter aim a fire hose from 4 feet above the ground at a window that is 26 feet above the ground. The equation h=-0.01d^2+1.06d+4 models the path of the water when h equals height in feet. Estimate, to the nearest whole number, the possible

asked by Cassie on February 1, 2009
52. ## Math

A circular path around a lake has a diameter of 2,000 feet (ft). Pranotti jogs around the path 5 times for her morning run. How far does she run? Use 3.14 for ƒàƒnand round your answer to the nearest foot

53. ## Math

Sam wants to find the height of a window in a nearby building but it is a cloudy day with no shadows. Sam puts a mirror on the ground between himself and the building. He tilts it toward him so that when he is standing up, he sees the reflection of the

asked by Jiska on January 28, 2016
54. ## Math

It is known that if the deer population falls below a certain level, m, then the deer will become extinct. It is also known that is the deer population goes above the maximum carrying capacity, M, the population will decrease to M. (a) Discuss the

asked by Jenny on April 20, 2012
55. ## Science

1. How is a model of an atom different from a real atom? A. A model of an atom is not as big as an actual atom. B. A model of an atom is the same as a real atom. C. A model of an atom is more complex than a real atom. D. A model of an atom is not as small

asked by Amber on August 26, 2014
56. ## physics

n aircraft uses a rocket-assisted takeoff unit (RATO) that is capable of discharging 49.0 kg of gas in 15.0 s with an exhaust velocity of 1300 m/s. The 3000 kg aircraft, on an ordinary takeoff without RATO, requires a distance of 440 m to reach a lift-off

asked by anonymus on August 30, 2018
57. ## fraction

Give examples of three categories of fraction models. What real models have you used that correspond to each of these? I pretty much understand the first part of this question: I know that the three models are set model, length or measurement model and

asked by Ashley on March 17, 2008
58. ## science- physics

Two spheres are launched horizontally from a 1.1 m -high table. Sphere A is launched with an initial speed of 4.5 m/s . Sphere B is launched with an initial speed of 1.5 m/s . What is the distance that sphere A travels from the edge of the table? What is

asked by Laura on October 15, 2015
59. ## history

Why did the building of the Transcontinental Railroad have to be shelved for a few years? Iron rails rusted, and the wait for steel rails was extremely long. There were not enough workers to complete the building process. Native American attacks made the

asked by Michael on December 17, 2018
60. ## English

1. Look at the top left building in the picture. 2. Look at the bottom right building. It's name is Brownstone Middle School. When was it built? It was built 70 years ago. 3. What about Town Bank? We can not get any information from the script, so we don't

asked by rfvv on November 25, 2009
61. ## Math

At 6:00 A.M. the temperature was 33Â°F. By noon the temperature had increased by 10Â°F and by 3:00 P.M. it had increased another 12Â°F. If at 10:00 P.M. the temperature had decreased by 15Â°F, how much does the temperature need to rise or fall to

62. ## statistics

The space shuttle is launched 9 times a year with a break down occurring 1/10 of the time. What is the probability that two randomly selected space shuttles launched 9 times a year and both having accidents occurring in that year?

asked by Anonymous on February 10, 2014
63. ## Calculus

A ladder 15 feet long is leaning against a building so that end X is on level ground and end Y is on the wall. Point 0 is where the wall meets the ground. X is moving away from the building at a constant rate of 1/2 foot per second. (a.) Find the rate in

asked by Amy on February 5, 2012
64. ## algebra

Jenn will use 18 connecting cubes to make a model of a park. The model will b in the shape of a rectangle and will have the height of one cube. In how many different ways can Jenn make the model of the park ?

asked by Anonymous on December 7, 2011
65. ## Algebra

An art student wants to make a model of the classroom. The length of the classroom is 2.4 times its width .The length of the students model is 42 in What should the width of the model be? My answer is 17.5 inches

asked by Faye on August 25, 2014
66. ## Math

A model airplane is made on a scale of 1:128. A)what is the scale factor? b) if the airplane model has a wingspan of 30cm,what is the wingspan of the actual plane? use model over original

asked by Cleopatra on April 2, 2014
67. ## University Physics

Building A and Building B are 30m away from each other, on the 4th floor; 35m high, someone has set up a slingshot from the window on the 4th floor of building A and is trying to sling a balloon into the window directly across from them in building B. the

asked by Britt on March 5, 2012
68. ## probability and statistics

For the model X=Θ+W, and under the usual independence and normality assumptions for Θ and W, the mean squared error of the LMS estimator is 1(1/σ02)+(1/σ12), where σ02 and σ12 are the variances of Θ and W, respectively. Suppose now that we change

asked by AAA on April 1, 2017
69. ## Calculus

A fence 5 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building? [Hint: Determine the length of a ladder

asked by Z32 on June 22, 2009
70. ## TRIG Help help help test tommarow

A TV tower stands on top of the Empire State building. From a point (on the ground) 1150 feet from the base of the building, the angle of elevation to the top of the TV tower is 52 degrees. If the building is 1250 feet tall, what is the length of the TV

asked by Precious on May 22, 2013
71. ## Math

A model airplane is shot up from a platform 1 foot above the ground with an initial upward velocity of 56 feet per second. The height of the airplane above ground after t seconds is given by the equation h=-16t^+56t+1, where h is the height of the airplane

asked by Ben on July 24, 2014
72. ## Science

A horizontal projectile with mass of 19.0kg is launched from a height of 7.0m above ground level with a horizontal speed of 250.0m/s. A)During projectile's flight, what forces are acting on it? B)What are the sizes & directions of the forces? C)Assuming

asked by Jenny on June 29, 2008
73. ## Physics

A 6.2 kg model rocket is traveling horizontally and due south with a speed of 20.3 m/s when it explodes into two pieces. The velocity of one piece, with a mass of 1.6 kg, is v1 = (-12 m/s)i + (30 m/s)j + (15 m/s)k, with i pointing due east, j pointing due

asked by Nat on February 24, 2014
74. ## English

I have to add prepositional phrases to the following sentences. Please check to see if correct. 1.The carpenter repaired the roof. 2.The coach explained the play. 1.The carpenter repaired the roof in the house. 2.The coach down the street explained the

asked by Chris on November 3, 2010
75. ## physics

A ball is thrown upward from the top of a 40.0 m tall building. The ball's initial speed is 12.0 m/s. At the same instant, a person is running on the ground at a distance of 31.0 m from the building. What must be the average speed of the person if he

asked by sandhu on September 17, 2009
76. ## Physics

A ball is thrown upward from the top of a 24.6 m tall building. The ball's initial speed is 12 m/s. At the same instant, a person is running on the ground at a distance of 31.2 m from the building. What must be the average speed of the person if he is to

asked by Jenn on September 23, 2012
77. ## physics

A ball is thrown upward from the top of a 24.4-m-tall building. The ball's initial speed is 12 m/s. At the same instant, a person is running on the ground at a distance of 30.2 m from the building. What must be the average speed of the person if he is to

asked by mae on August 30, 2011
78. ## Physics

A ball is thrown upward from the top of a 50.0 m tall building. The ball's initial speed is 12.0 m/s. At the same instant, a person is running on the ground at a distance of 44.0 m from the building. What must be the average speed of the person if he is to

asked by Kelly on February 5, 2012
79. ## physic

A ball is thrown upward from the top of a 24.4 m tall building. The ball's initial speed is 12 m/s. At the same instant, a person is running on the ground at a distance of 31.4 m from the building. What must be the average speed of the person if he is to

asked by Anonymous on August 29, 2012
80. ## math

A path 3m wide surrounds a rectangular garden 15 m wide and 18 mlong .what is the area of the path ?

asked by cinthya on July 16, 2009
81. ## Calc

A particle moves along a path described by x=cos³t and y=sin³t. The distance that the particle travels along the path from t=0 to t=π/2 is... Thank you!

asked by Erica on April 25, 2011
82. ## Trigonometry

A building 200 feet tall casts an 80 ft long shadow. If a person looks down from the top of the building which of the following is the measure of the angle between the end of the shadow and the vertical side of the building to the nearest degree? I

asked by Ben on February 23, 2017
83. ## math

From A, due east of the building, the angle of elevation of the top is 45 degree. From B, southwest of the building, the angle of elevation is 30 degree. If AB=250m, find the height of the building.

asked by somay on January 25, 2016
84. ## math

From A, due east of a building, the angle of elevation of the top is 45 degree. From B, southwest of the building , the angle of elevation is 30 degree. If AB=250m, find the heigt of the building.

asked by Anonymous on January 25, 2016
85. ## calculus

A fence 8 feet tall stands on level ground and runs parallel to a tall building. If the fence is 1 foot from the building, find the shortest ladder that will extend from the ground over the fence to the wall of the building.

asked by Erica on October 11, 2012
86. ## Algebra

A 10 foot ladder is to be placed against the side of a building. The base of the ladder must be placed at an angle of 72degree with the level ground for a secure footing. Find to the nearest inch, how far of the ladder should be from the side of the

asked by Zing on February 7, 2012
87. ## Psychology

Describe how a person moves through each of the five stages of Levinger's ABC's of relationships model. As you write your description, include answers to the following questions; What do you think people look for in the attrction stage? How do people work

asked by Donna on July 17, 2008
88. ## Math

Sam wants to find the height of a window in a nearby building but it is cloudy. Sam puts a mirror on the ground between himself and the building. He tilts it toward him so that when he is standing up he sees the reflection of the window. The base of the

asked by Ashley on March 10, 2016
89. ## Physics

Mars' moon Phobos has a mass of 1.07x1016 kg and a mean radius of 11.1 km. Let's say our rocket blasts off from the surface of Phobos when Phobos is 9500 km from the surface of Mars. Does the rocket have to work harder to escape from the gravitational pull

asked by Raj on October 21, 2007
90. ## Economics

The table below shows annual demand (in 1,000,000 units per year) for Widgets. Use this information to calculate a constant growth forecasting model. Use your growth model to forecast demand for the years 1995 and 2000. Year Demand 1990 1.1 1991 1.5 1992

asked by Andrew on November 29, 2006
91. ## physics

A 20000 kg satellite is launched from the surface of saturn and put into orbit.The satellite is launched at the speed of 27.5 x 10^3 m/s. a)calculte the satellite's total energy. b)Its orbital radius c)If the satellite was shot straight up at the same

asked by Roger on June 18, 2012
92. ## Trigonometry (Math)

A ladder 42 feet long is place so that it will reach a window 30 feet high (first building) on one side of a street; if it is turned over, its foot being held in position, it will reach a window 2o5 feet high (second building) on the other side of the

asked by Alianne on February 7, 2012
93. ## trigonometry

a submarine at the surface of the ocean makes an emergency dive, its path making an angle of 21 degree with the surface. if it goes 300m long its download path, how deep will it be? what horizontal distance is it from its starting point?

asked by riza on December 10, 2012
94. ## MATH

8 A ladder that is 13 feet long leans against a building. The bottom of the ladder is 5 feet away from the base of the building. How far up the side of the building does the ladder reach? 18 ft 16 ft 12 ft \ 8 ft*****

asked by LALALMAMACASA on November 30, 2017
95. ## Math

For a history project, Marcus built a replica of the Texas State Capitol building. His model has a scale factor of 1/100. If the height of the Capitol's dome is 310 feet, how high is the dome on Marcus' replica?

asked by Chace on December 16, 2012

i work at a small company that creates and markets video games. it is a 4 story office building.other business in the building are a dentist, young lawyer,and an insurance company.the building supplies space but little else in the way of service. i need to

asked by lisa on April 25, 2009
97. ## Physics/Math

The Formula you use is the correct one. However, consider this. If the initial PE existed, wouldn't you have to add it to the initial KE then subtract the PE at some R from the center? We normally make ground zero PE level, but for this... Zero, a

asked by bobpursley on March 11, 2007
98. ## Math

If a building 1 begins with four blocks and increases by three blocks each building, how many blocks will it take to make building 1,000

asked by Gaby on September 20, 2007
99. ## Math

Sam wants to find the height of a window in a nearby building but it is a cloudy day. Sam puts a mirror on the ground between himself and the building. He tilts it so that when he is standing up he sees the reflection of the window. The base of the mirror

asked by Ashley on March 10, 2016
100. ## math algebra

Gray Glaze requires 15 hours to put a new roof on a house. His apprentice, Anna Gandy, can record the house by herself in 20 hours. After working alone on a roof for 6 hours, Gary leaves for another job. Anna takes over and completes the job. How long does

asked by jacky on November 19, 2016