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The height of an object dropped from the top of a 320-meter building is given by h(t)= -5t^2+320. how long will it take the object to hit the ground

The height of an object dropped from the top of a 320-meter building is given by h(t)= -5t^2+320. how long will it take the object to hit the ground
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the height of an object dropped from the top of a 320-meter building is given by h(t)= -5t^2+320. how long will it take the object to hit the ground

User Kalzem
by
8.5k points

1 Answer

1 vote
0=320-5t^2
320=5t^2
t^2=64
t^2=8^2
t=8
User Huserben
by
8.2k points
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