If an airplane is moving at velocity v, the drag D (in N ) on the plane is D=av2+bv2, where a=5.[a]0×10-3 and b=3.0[e]×108. Find the value(s) of v (in km/h), for which the drag is the least. Round the answer to one decimal place. Both coefficients, a and b, already account for the unit converstion (from m/s to km/h).