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A punter kicks a football upward with an initial speed of 48 feet per second. After how many seconds does the ball hit the ground? Use the formula h=rt-16t^2 where h represents height in feet and r represents the initial speed.

Question

Ill Give Medal and Fan!!!!!!


A punter kicks a football upward with an initial speed of 48 feet per second. After how many seconds does the ball hit the ground? Use the formula h=rt-16t^2 where h represents height in feet and r represents the initial speed.

anonymous · Answer

h = 0 when it hits the ground, therefore: 
 -16t^2 + 48t = 0 

 --------------------------------------... 
 Factor out -16t 
 -16t(t + 3) = 0 
 : 
 Two solutions 
 t = 0, when it begins it's upward journey 
 and 
 t = 3 sec, when it returns to earth

anonymous · Answer

did that help?

anonymous · Answer

factoring out that equation was -3 right

anonymous · Answer

can you help me with my recent question? no one will