SOLUTION: Hitting a golf ball into a tower? While on the golf course last weekend Marc hit into the rough landing the ball behind a tall tree. His best option was to get it high enough t

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Question 1171206: Hitting a golf ball into a tower?
While on the golf course last weekend Marc
hit into the rough landing the ball behind a
tall tree. His best option was to get it high
enough to get over the tree and hopefully
come down in the fairway for his next shot.
So with a mighty swing he hit the ball into
the air and was surprised to see the ball hit
near the top of a 300 foot tall tower that he
had not noticed.
The formula for this shot is:
h(x)=-16x^2+120x where h is the height
of the ball and x is the number of seconds
the ball is in the air
How long did the ball actually hang in the air?
Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website!
-16x^2+120x=0 is where the ball started and ended (regarding time in seconds)
-16x(x-7.5)=0
x=0 and 7.5 seconds.
It was in the air for 7.5 seconds.