Question
A kicker kicks a football during practice. The equation below can be used to find the height (h) in feet after t seconds.
h(t)=-16t^2+96t
After how many seconds will the ball hit the ground?
A. 6
B. 7
C. 96
D. 0
My answer is B, is this correct?
h(t)=-16t^2+96t
After how many seconds will the ball hit the ground?
A. 6
B. 7
C. 96
D. 0
My answer is B, is this correct?
Answers
Steve
well, plug in t=7.
-16*49 + 96*7 = -112
You must be guessing, not calculating.
When the ball hits the ground, its height is zero, right?
Note that
h(t) = -16t(t-6)
Now, when is h=0?
-16*49 + 96*7 = -112
You must be guessing, not calculating.
When the ball hits the ground, its height is zero, right?
Note that
h(t) = -16t(t-6)
Now, when is h=0?