Tuesday

September 16, 2014

September 16, 2014

Posted by **Alyson** on Monday, October 3, 2011 at 11:16pm.

(i) What is its initial height? __________ ft.

(ii) What is its maximum height? ___________ ft.

(iii) How long does it take to reach the ground? __________ sec.

- Math -
**Steve**, Tuesday, October 4, 2011 at 10:43aminitial height is when t=0. 448

h = -16(tē - 3t - 28)

= -16(t-7)(t+4)

Note that h=0 when t=7. That's the answer to part iii

Since the two roots are -4 & 7, the apex is reached at t = (-4 + 7)/2 = 1.5

h(1.5) = -16(5.5)(5.5) = 484 ft

- Math -
**jaja**, Tuesday, October 15, 2013 at 6:48pm-16t^2+48t+864

**Answer this Question**

**Related Questions**

college algebra - a rocket is fired upward from some initial distance above the ...

algebra - The question I have is to solve the problem. A model rocket is ...

Math - A model airplane is shot up from a platform 1 foot above the ground with ...

Math - A rocket is launched upward and then falls to the ground. The height of ...

calculus - Can some explain how to do this problem? I tried using derivatives...

college algebra - A model rocket is launches upward with an initial velocity of ...

Math/calculus - a toy rocket is shot into the air at the top of a building so ...

algebra - the path of a rocket fired during a fireworks display is given by the ...

Math B - The path of a rocket fired during a fireworks display is given by the ...

math - A cannonball is fired across a field. Its height above the ground after t...