To determine drug dosages, doctors estimate a person's body surface (BSA) (in meters squared) using the formula:
BSA= sqrt(hm)/ 60
Where h is the height in centimeters and m is the mass in kilograms. Calculate the rate of change of BSA with respect to height for a person of a constant mass of m =85. What is this rate at h =170 and h=190. Express your results in the correct units. Does the BSA increase more rapidly with respect to height at lower or higher height?