Chapter 1.3, Problem 62E

Mass of juvenile desert tortoises In a study conducted at the University of New Mexico, it was found that the mass m(t) (in grams) of juvenile desert tortoises t days after a switch to a particular diet is accurately described by the function $m\left(t\right)=m_0{e}^{0.004t}$, where m₀ is the mass of the tortoise at the time of the diet switch. According to this function, how long does it take a juvenile desert tortoise to reach a mass of 150 g if it had a mass of 64 g when its diet was switched? (Source: Physiological and Biochemical Zoology, 85, 1, 2012)