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AlekseyPX
3 years ago
14

Sharon kicks a ball from the ground into the air with an upward velocity of 64 feet per second. The function h = -16t2 + 64t mod

els the height h, in feet, of the ball at time t, in seconds. When will the ball reach the ground again?
A: 1 second after the ball is thrown

B: 2 seconds after the ball is thrown

C: 3 seconds after the ball is thrown

D: 4 seconds after the ball is thrown
Mathematics
2 answers:
iren2701 [21]3 years ago
7 0
When the ball reaches the ground is equal to one of the zeros, or x-intercepts. In order to find the zeros of a function, you need to factor the equation.
y=16x^2+64x
y=-16x(x-4)
The zeros are x=0 and x=4
Therefore the answer is D, after 4 seconds.
Hope this helps!
avanturin [10]3 years ago
3 0
The answer would be 4 seconds
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