h(d)= -3.9d^{2}+13.1d+8.7

When Alex rides his dirt bike off a ramp, his path can be modelled by, where d is the horizontal distance from the ramp and h is the height, both in metres. How far away from the ramp does he land, to the nearest tenth of a metre?

Guest Jul 9, 2021

#1**+3 **

h(d) = 0 when he lands

0 = -3.9d^2 + 13 + 8.7 Quadratic Formula shows d = 3.9 meters

ElectricPavlov Jul 9, 2021

#2**+2 **

Graphing the equation on a ti or Desmos is simplest. to the nearest tenth, it is **3.9**

HighSchoolDx Jul 9, 2021