Math

An object is projected directly upward from the ground. Its distance in feet from the ground in t seconds is s equals s=112t−16t^2

The object will be 160 feet from the ground after () ​second(s) and after
() ​second(s).
The object strikes the ground after () ​second(s).

1. 👍 0
2. 👎 0
3. 👁 335
1. 16 t^2 -112 t +160 = 0
t^2 - 7 t + 10 = 0

(t-5)(t-2) = 0

so at 2 seconds on the way up and at 5 seconds on the way down

0 = 16t (7 - t)
crash at t = 7

1. 👍 0
2. 👎 0
posted by Damon

Similar Questions

1. Math

An object is projected directly upward from the ground. After t seconds it’s distance in feet above the ground is s=144t-16t^2 How long does it take the object to reach its maximum height? What is the maximum height the object

asked by ... on May 9, 2019
2. College Algebra

An object is projected vertically upward from the top of a building with an initial velocity of 112 ft/sec. Its distance s(t) in feet above the ground after t seconds is given by the equation s(t) = −16t^2 + 112t + 100. (a) Find

asked by Kyle on November 12, 2014
3. Math

An object is projected vertically upward from the top of a building with an initial velocity of 144 ft/sec. Its distance s(t) in feet above the ground after t seconds is given by the function s(t) = −16t2 + 144t + 120. A) Find

asked by Mack on July 11, 2013

The height of an object projected upward from ground level is given by h=-16t squared + 128t. When will the object be 240 feet above the ground? (Please provide steps/explanation to solve this problem.)

asked by purpletree on March 29, 2009
5. College Math

An object is projected vertically upward with an initial velocity of v0 ft/sec, and its distance s(t) in feet above the ground after t seconds is given by the formula s(t) = −16t^2 + v0t. (a) If the object hits the ground after

asked by Kyle on November 10, 2014
6. College Algebra

A ball is projected upward from the ground. Its distance in feet from the ground in t seconds is given by s(t) = -16t^(2)+128t At what times will the ball be at 213ft from the ground?

asked by Keonn'a on April 18, 2017
7. Help College Algebra

A ball is projected upward from the ground. Its distance in feet from the ground in t seconds is given by s(t) = -16t^(2)+128t At what will the ball be at 213ft from the ground?

asked by Keonn'a on April 18, 2017
8. Math : Statistics

The formula h=vt−16t^2 gives the height h, in feet, of an object projected into the air with an initial vertical velocity v, in feet per second, after t seconds. If an object is projected upward with an initial velocity of 112

asked by Keonn'a on November 2, 2018
9. algebra

Please help me solve this: If an object is projected upward with an initial velocity of 112 feet per second from a height h of 128 feet, then its height t seconds after it is projected is defined by the equation h=-16t^2 + 112t +

asked by Danielle on July 14, 2014
10. Math

Please help if you can. If a ball is shot projected straight upward at a rate of 64 feet per second from a rooftop, 80 feet above ground level, the height of feet above ground is modeled by the equation, h(t)=-16t^2+64t+80 Find

asked by A.J. on November 21, 2009

More Similar Questions