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Mathematics, 05.12.2020 05:50 kingalbyss1230

The function f(t)=-5t^2+20t+60 models the approximate height of an object t seconds after it is launched. How many seconds does it take the object to hit the ground?

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The function f(t)=-5t^2+20t+60 models the approximate height of an object t seconds after it is laun...
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