Hello :
the midepoint is( (-1+7)/2 ; (3+2)/2)
(3, 5/2) ... answer C
Answer:
12 seconds
Step-by-step explanation:
Given

Required
Determine the time taken to reach the ground
For the paper to reach the ground, y = 0
So, we have:


Collect Like Terms


Divide through by 2.5



<em>Hence:</em>
<em>Time taken is 12 seconds</em>