americasmiller americasmiller

12-11-2017
Mathematics

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

I started the bottom question but I dont understand how to finish it class=

Respuesta :

bssh224 bssh224

12-11-2017

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)

Answer Link

12-11-2017

0 = -16t^2 +120t
16t^2 = 120t
16t = 120
t = 120/16

Answer Link

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