Solve the Problem. -Wind Speed Varies in the First Twenty Meters Above the Meters

Multiple Choice

Solve the problem.
-Wind speed varies in the first twenty meters above the ground. For a particular day, let f(x) = 2.1 lnx + 3.1 compute the wind speed x meters above the ground. At what height is the wind speed 5 meters per second?
Round results to the nearest hundredth.

A) 2.46 m
B) 0.40 m
C) 0.90 m
D) 1.22 m