If you would like to find f(7) and round the answer to the nearest hundredth, you can do this using the following steps:
n > 0
f(n) = 0.3 * f(n-1)
f(5) = 12
f(6) = 0.3 * f(6-1) = 0.3 * f(5) = 0.3 * 12 = 3.6
f(7) = 0.3 * f(7-1) = 0.3 * f(6) = 0.3 * 3.6 = 1.08
The correct result would be 1.08.