# math

If a stone is tossed from the top of a 330 meter building, the height of the stone as a function of time is given by h(t) = -9.8t2 – 10t + 330, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest hundredth’s place; include units in your answer.
0 = -9.8t2 - 10t + 330

1. 👍 0
2. 👎 0
3. 👁 135
1. The formula is wrong.
That should be -4.9 t^2 as the first term, not -9.8 t2. They should be using g/2, not g, as the coefficient.

If the formula were correct, you would set h(t) = 0 and solve for t.

Alwas use a ^ in front of an exponent when typing questions.

Whatever outfit is being paid to teach you is not doing a very good job.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Precalculus

To estimate the height of a building, two students find the angle of elevation from a point (at ground level) down the street from the building to the top of the building is 33 degrees. From a point that is 300 feet closer to the

asked by marie darling on April 26, 2013
2. ### science

Two stones are launched from the top of a tall building. One stone is thrown in a direction 30.0degree above the horizontal with a speed of 10.0m/s ; the other is thrown in a direction 30.0degree below the horizontal with the same

asked by bob on September 8, 2008
3. ### physics

A stone is thrown from the top of a building upward at an angle of 30.0∘to the horizontal and with an initial speed of 20.0 m/s. If the height of the building is 45.0 m, what is the speed in m/sec of the stone just before it

asked by Rachit agrawal on September 8, 2014
4. ### maths

a chimney of 20m height standing on the top of a building subtends an angle whose tangent is 1/6 at a distance of 70m from the foot of the building find the height of the building .

asked by Anonymous on February 10, 2013
1. ### physics

a student standing on the roof of a 50 meter high building kicks a stone at a horizontal speed of 4 meters per second, how much time is required for the stone to reach the level ground below?

asked by jack on January 16, 2011
2. ### math

a plat form and a building are on the same horizontal plane , the angle of depression of the bottom of the building from the top A of the platform is 39 degree. the angle of elevation of the top D of the building from the top of

asked by chris on May 12, 2016
3. ### SCIENCE

A stone thrown from the top of a building is given an initial velocity of 40.0 m/s straight upward. The building is 70.0m high, and the stone just misses the edge of the roof on its way down, determine (A) The time at which the

asked by BENSON on April 12, 2017
4. ### Math

From the top of a 200 metres high building, the angle of depression to the bottom of a second building is 20°. From the same point, the angle of elevation to the top of the second building is 10°. Calculate the height of the

asked by Anonymous on November 10, 2019
1. ### Math

A platform and a building are on thesame plane. The angle of depression of the bottom(c) of the building from is 39degree. The angle of elevation of the top(o) of the building From the top of the platform is 56. Given that the

asked by Evans on February 20, 2016
2. ### PHYSICS

A stone thrown from the top of a building is given an initial velocity of 40.0 m/s straight upward. The building is 70.0m high, and the stone just misses the edge of the roof on its way down, determine (A) The time at which the

asked by BENSON on April 12, 2017
3. ### physical science

A stone of 8 kg mass falls from the top of an 80 m-high building. Find the velocity of the stone when it reaches the ground

asked by tye on March 3, 2015
4. ### physics

A rock is shot vertically upward from the edge of the top of a tall building.The rock reaches its maximum height above the top of the building 1.90 s after being shot. Then, after barely missing the edge of the building as it

asked by kristy on September 12, 2013