Greg is in a car at the top of a roller-coaster ride. The distance, d, of the car from the ground as the car descends is determined by the equation d = 144 – 16t2, where t is the number of seconds it takes the car to travel down to each point on the ride. For which interval of time is Greg’s car moving in the air?
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For 3 Seconds Greg's Car is moving in the air
Step-by-step explanation:
d = 144 - 16t²
t d
0 144
1 128
2 80
3 0
d = 144 - 16t²
=> 0 = 144 - 16t²
=> 16t² = 144
=> t² = 9
=> t = 3
For 3 Seconds Greg's Car is moving in the air
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