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#34735

applications

quadratic equations

functions

medium

150 sec

The trajectory of a projectile launched from a platform is modeled by the function $h (t) = - 16 t^{2} + 128 t + 144$ , where $h (t)$ is the height in feet above the ground and $t$ is the time in seconds after launch. How many seconds after launch does the projectile hit the ground?

• Up to 5 characters (6 if negative). Only numbers, decimal (.), fraction (/), negative (-).
• Fractions must be in lowest terms.
• Mixed numbers must be converted to improper fractions.