20.
relief donations the number of private donations
received by nongovernment disaster relief organizations can
be modeled as
f(x) = 0.3xe -0.03x thousand donations
where x is the number of hours since a major disaster has
struck
a. write an expression for the rate of change in donations.
b. at what time is the rate of change of donations zero?
c. what is the donation level at the time found in part b?