h(d)= -3.9d2+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?
+37159 h(d) = 0 when he lands
0 = -3.9d^2 + 13 + 8.7 Quadratic Formula shows d = 3.9 meters
+137 Graphing the equation on a ti or Desmos is simplest. to the nearest tenth, it is 3.9
