1.A catapult launches a boulder with an upward velocity of 120 ft/s. The height of the boulder, h, in feet after t seconds is given by the function h=-16t^2+120t+10. How long does it take to reach maximum height? What is the boulder's maximum height? round to the nearest hundredth, if neccessary.
A. Reaches a maximum height of 235.00 feet in 3.75 seconds
B.Reaches a maximum height of 10.00 feet in 7.50 seconds
C.Reaches a maximum height of 7.58 feet in 3.75 seconds****
D.Reaches a maximum height of 15.16 feet in 7.5 seconds

Please correct me if I'm wrong.
I think the answer is C.

Question

1.A catapult launches a boulder with an upward velocity of 120 ft/s. The height of the boulder, h, in feet after t seconds is given by the function h=-16t^2+120t+10. How long does it take to reach maximum height? What is the boulder's maximum height? round to the nearest hundredth, if neccessary. 
A. Reaches a maximum height of 235.00 feet in 3.75 seconds 
B.Reaches a maximum height of 10.00 feet in 7.50 seconds 
C.Reaches a maximum height of 7.58 feet in 3.75 seconds**** 
D.Reaches a maximum height of 15.16 feet in 7.5 seconds 

Please correct me if I'm wrong. 
I think the answer is C.

anonomoose · Answer

Correct answer is A