Quadratic Equation

Question

A falling object travels a distance given by the formula. d = 2t + 2t^2, where d is measured in feet and t is measured in seconds. How many seconds will it take for the object to travel 85 feet? Round the answer to the 4 decimal places.

Answer 1

6.0383 seconds to reach 85 feet

h(6.0383) = 2(6.0383)^2 + 2(6.0383)

= 72.9233 + 12.0766

= 84.9999 = about 85 feet