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3 years ago

I need help on number 8 please help!!!

Mathematics

1 answer:

kherson [118]3 years ago

4 0

Answer:

A) 9 ft
B) 13 ft
C) 1/2 second

Step-by-step explanation:

Your notes on the problem tell you how to work it.

Part A. The height of the ball when t=0 is d(0) = 9 . . . . feet.

____

Part C. (Your notes rightly say work this first.)

... t = -b/(2a) = -16/(2(-16)) = 1/2

The ball reaches its maximum height after 1/2 second.

____

Part B. d(1/2) = 16t(-t+1) +9 = (16)(1/2)(-1/2 +1) +9 = 4 +9 = 13 . . . . feet.

The maximum height is 13 ft.

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