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aleksklad [387]
3 years ago
6

An arrow is fired into the air with an initial upward velocity of 64 feet per second from the top of a building 80 feet high.

Mathematics
1 answer:
astra-53 [7]3 years ago
8 0

Answer:

128 = 80 + 64 t - 16 t^2

8 = 5 + 4 t - t^2

3 = t (4 - t)

Inspection shows the equation is solved if

t = 1   and t = 3

Plug into original equation to check

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