Answer:
6 cm
Step-by-step explanation:
The diameter is 2x the radius
There is a lack of a diagram to go along with this question...
<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>
I was on the right track, lol. 280.5 miles.