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aliya0001 [1]
3 years ago
11

The function f(t) = −5t 2 + 20t + 60 models the approximate height of an object

Mathematics
1 answer:
kakasveta [241]3 years ago
3 0
Plug in f(t) = 0. We do this because f(t) represents the height and a height of 0 means you're at the ground. 

f(t) =-5t^2 + 20t + 60 

0 = -5t^2 + 20t + 60 

-5t^2 + 20t + 60 = 0 

Now solve for t using the quadratic formula 
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