(1/5)^e * (1/4)^18 = 1/(2(10)^35). What is e? Pick one
A) 17  B) 18  C) 34  D) 35  E) 36

Rationale: we need to arrive at a common base . - - > ( 5 ) ^ ( - e ) * 2 ^ ( - 36 ) = 2 ^ ( - 36 ) * 5 ^ ( - 35 ) 5 ^ ( - e ) = 5 ^ ( - 35 ) - e = - 35 e = 35 = d
Answer: D