amc9639
28.11.2019 •
Mathematics
Aprojectile was launched straight up from the ground with an initial velocity of 48 ft/s. the height of the projectile t seconds after launch is modeled by the function f(t)=−16t2+48t
how long was the projectile in the air before it hit the ground?
3 seconds
4 seconds
5 seconds
6 seconds
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