When the ball hits the ground, the height is 0.
0 = 100 - 16t²
0 = (10 - 4t)(10 + 4t)
0 = 10 - 4t or 0 = 10 + 4t
4t = 10 or -4t = 10
t =
or t = 
Time cannot be negative (unless you have a time machine) so disregard 
Answer: t =
= 2.5 seconds
Answer:
the answer is below
Step-by-step explanation:
multiply like this
<h2>L×b×h</h2>
Answer: 2 2/5
Step-by-step explanation:
Denominator stays the same, divide 12 and 5, remainder at the top