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QUESTION
The function f(c)=-10(x)(x-4) represents the approximate height of a projectile launched from the ground into the air with an initial velocity of 40 meters per second. How long, from launch to landing
The function f(c)=-10(x)(x-4) represents the approximate height of a projectile launched from the ground into the air with an initial velocity of 40 meters per second. How long, from launch to landing, does the projectile stay in the air?
