AM-490

Quadratic models

A Math · Secondary 3 · Medium · Quadratic models

The height

h

metres of a firework above the ground

t

seconds after launch is given by

h(t)=-5t^2+20t+3

. What is the maximum height reached?

$23\text{ m}$
$43\text{ m}$
$3\text{ m}$
$20\text{ m}$

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