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#15297

functions

polynomials

applications

medium

25 sec

A ball is thrown vertically upward from the top of a building. The height of the ball above the ground, in feet, is given by the equation $h = - 16 t^{2} + 30 t + 80$ , where $t$ is the time in seconds after the ball is thrown. What is the height, in feet, from which the ball was thrown?

• 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.