Question

If a ball is thrown straight up from the top of a building that is 400
feet high, the position in feet above the ground is given by the
function s(t) = -16t2 + 45t + 400 where t is the number of seconds
elapsed.
a. How high is the projectile after 3 seconds?

b. How long will it take for the ball to reach a height of 200 feet
above the ground? Round to the nearest tenths.

Answer 1

Answer:

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