Posted by **Math is HARD** on Tuesday, November 9, 2010 at 5:33am.

If a projectile is launched from a platform 30 feet high with an initial velocity of 128 feet per second, then the height of the projectile at t seconds is given by s(t) = –16t2 + 128t + 30 feet.

(a) At what time does the projectile attain its maximum height? Show some work.

(b) What is the maximum height attained by the projectile? Show some work.

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