3. Greg is in a car at the top of a roller-coaster ride. The distance, d(t), of the car from the ground as the car descends is determined by the equation d(t) = 144 - 167,
where t is the number of seconds it takes the car to travel down to each point on theride. How many seconds will it take Greg to reach the ground?

3 seconds

Step-by-step explanation:

Hi, the correct equation is d (t) = 144- 16 t²

So, to answer this question we have to analyze the information given:

When the car reaches the ground the distance, d (t) of the car from the ground is 0.

0 = 144- 16 t²

Solving for t:

16 t² =144

t²=144/16

t²= 9

t = √9

t = 3 seconds  

Feel free to ask for more if needed or if you did not understand something.  

step-by-step explanation: