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I started the bottom question but I don’t understand how to finish it...
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1 vote
I started the bottom question but I don’t understand how to finish it...

I started the bottom question but I don’t understand how to finish it...-example-1
User Mmtauqir
by
8.1k points

2 Answers

4 votes
0 = -16t^2 +120t
16t^2 = 120t
16t = 120
t = 120/16
User Guruprasad J Rao
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7.7k points
5 votes
so s(t) will be at 0 twice, once in the beginning and once in the end.

To find how long it's in the air, we need to find t when s(t) = 0

0 = -16t^2 +120t
16t^2 = 120t
16t = 120
t = 120/16 (that is how long it's in the air)

User JoeGeeky
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