7 + 1 2/6 2/5 hope this kinda helps :3
Answer:
D
Step-by-step explanation:
You have to use pythagorean theorem to solve this.
<span>68=-16t2+64t+8
16t2-64t+60=0
4t2-16t+15=0
(2t-5)(2t-3)=0
t=5/2 or 3/2
The object is at 68 feet after 3/2 secs, and returns to 68 feet after another second..</span>
The answer is D. All the opposite sides are congruent.