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SAT MATH · Quadratics & Parabolas · Standard

Quadratics & Parabolas: A ball's height is math. At what time does it reach maximum height?

Factoring, vertex form, discriminant.

Try the problem

A ball's height is h=−5t2+20t+3h=-5t^2+20t+3. At what time does it reach maximum height?

Hint and answer

Concept to use

$\Delta=b^2-4ac$.

Hint

Use −b/(2a)-b/(2a).

Answer

2

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