Suppose a person's head diameter D and height H grow according to
D(t) = 10.0e0.03t
H(t) = 50.0e0.09t
during the first 15 years of life.
a. Find D and H at t =0, t =7.5, and t =15.
b. Sketch graphs of these two measurements as functions of time.
c. Sketch semi log graphs of these two measurements as functions of time.
d. Find the doubling time of each measurement.