(1/5)^f * (1/4)^18 = 1/(2(10)^35). What is f?  Choose the most appropriate option.
A) 17
B) 18
C) 34
D) 35
E) 36
We need to arrive at a common base. --&gt;   (5)^(-f) * 2^(-36) = 2^(-36)*5^(-35)   5^(-f)=5^(-35)   -f=-35   f=35=35
<result>D</result>
(1/5)^f * (1/4)^18 = 1/(2(10)^35). What is f?