The ambient temperature Tm in (3) could be a function of time t. Suppose that in an artificially controlled environment, Tm(t) is periodic with a 24-hour period, as illustrated in Figure 1.3.11. Devise a mathematical model for the temperature T(t) of a body within this environment.

L35 - 11 3 ex. The concentration C (in mg/cm )o fadugi a- tient’s bloodstream t hours after an injection is decreasing −2t 3 at the rate√ 3t +4 mg/cm per hour. By how much does the concentration decrease over the ﬁrst two hours