Solve problem.(Modeling) Airplane Landing Speed To determine the appropriate landing speed...

Solve problem.

(Modeling) Airplane Landing Speed To determine the appropriate landing speed of a small airplane, the formula

is used, where s is the initial landing speed in feet per second and D is the length of the runway in feet. If the landing speed is too fast, the pilot may run out of runway; if the speed is too slow, the plane may stall. If the runway is 800 ft long, what is the appropriate landing speed? Round to the nearest tenth.