Asked by Jane
A ball is kicked from ground level into the air. Its height y, in feet, after x seconds can be represented by the equation y = 40x -16x^2. What is the total elapsed time, in seconds, from the time the ball is kicked until it reaches grond level again?
Is the answer - 25 s
Is the answer - 25 s
Answers
Answered by
bobpursley
ground level is y=0
0=40x-16x^2= x(40-16x)
x=0, x= 40/16=2.5seconds
0=40x-16x^2= x(40-16x)
x=0, x= 40/16=2.5seconds
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