Multiple Choice
If a rocket is fired vertically into the air with a speed of
feet per second, its height at time t seconds is given by
. Here is a graph of its height at various times, with the details left out.
How long will the rocket be in the air? ( Hint : How high is it when it hits the ground?)
A) 17 seconds
B) 18 seconds
C) 21 seconds
D) 24 seconds
E) 16 seconds
Correct Answer:

Verified
Correct Answer:
Verified
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