Oil leaks from a tank. At hour $t=0$ there are 240 gallons of oil in the tank. Each hour after that, 5% of the oil leaks out.

(a) What percent of the original 240 gallons has leaked out after 6 hours?
%

(b) If $\ Q(t)=Q_0 e^{kt} \ $ is the quantity of oil remaining after $t$ hours, find the value of $k$.
$k =$

(c) What does $k$ tell you about the leaking oil? Select all that apply if more than one statement is true

A. It tells by what percent of oil decays each hour.
B. Because it is negative, we know the amount of oil in the tank is decreasing.
C. It is the amount that the oil that leaks out each second.
D. Because it is less than one, we know the amount of oil in the tank is decreasing.
E. It gives the continuous hourly rate at which oil is leaking.
F. It tells what percent of oil remains after each hour.
G. None of the above