(Modeling) Solve problem. For Exercise, see EXAMPLE.Height of a Projectile A projectile is...

(Modeling) Solve problem. For Exercise, see EXAMPLE.

Height of a Projectile A projectile is fired straight up from ground level. After t seconds, its height above the ground is s feet, where

For what time period is the projectile at least 624 ft above the ground?

EXAMPLE SOLVING A PROBLEM INVOLVING THE HEIGHT OF A PROJECTILE