Posted by **Brian** on Saturday, March 10, 2012 at 2:40pm.

A projectile is launched from a platform 20 feet high with an initial velocity of 72 feet per second,

The height h of the projectile at t seconds after launch is given by h = –16t2 + 72t + 20 feet.

(a) How many seconds after launch does the projectile attain maximum height? Show work.

(b) What is the maximum height? Show work.

## Answer this Question

## Related Questions

- math - If a projectile is launched from a platform 30 feet high with an initial ...
- calculus - The height of a projectile launched into the air is given by h (t)= -...
- intermediate algebra - A projectile is launched directly upward from the top of ...
- math - A projectile is fired directly upward with a muzzle velocity of 860 feet ...
- algebra - The height in feet of a projectile with an initial velocity of 32 feet...
- College Algebra - A projectile is thrown upward with an initial velocity of 272 ...
- algebra - A model rocket is launched upward with an initial velocity of 200 feet...
- algebra - The height in feet of a projectile with an initial velocity of 32 feet...
- Algebra - The height in feet of a projectile with an initial velocity of 32 feet...
- Algebra II - A projectile is launched from a platform 10 meters above ground ...