Mathematics, 07.10.2019 14:30 scottykinkade7860

Atrebuchet launches a projectile from a hilltop 30 feet above ground level on a parabolic arc at a velocity of 40 feet per second. the equation h = −16t2 + 40t + 30 models the projectile's h height at t seconds. how long will it take for the projectile to hit its target on the ground? (to the nearest tenth of a second)

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Atrebuchet launches a projectile from a hilltop 30 feet above ground level on a parabolic arc at a v...