Solve problem. See Examples.Height of a Projectile A projectile is launched from ground le...

Solve problem. See Examples.

Height of a Projectile A projectile is launched from ground level with an initial velocity of  feet per second. Neglecting air resistance, its height in feet t seconds after launch is given by  In Exercise, find the time(s) that the projectile will (a) reach a height of 80 ft and (b) return to the ground for the given value of . Round answers to the nearest hundredth if necessary.

EXAMPLE SOLVING A PROBLEM INVOLVING THE HEIGHT OF A PROJECTILE

EXAMPLE ANALYZING SPORT UTILITY VEHICLE (SUV) SALES

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