Mathematics, 22.03.2021 21:40 Kin90ful

A rocket is launched with an initial upward velocity of 320 feet per second from an initial height of 15 feet. The function h(t) = -16t2 + 320 t + 15 models the height of the rocket, in feet, t seconds after it was launched. For how many seconds is the height of the rocket greater than or equal to 1,039 feet?

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