if log 2 = 0.30103, the number of digits in 2128 is
.  Choose the correct option:
A) 38	B) 39	C) 40	D) 41	E) 56

Rationale: log ( 2128 ) = 128 log ( 2 ) = 128 × 0.30103 ≈ 38.4 ie , its characteristic = 38 hence , number of digits in 2128 = 38 + 1 = 39 answer : option b
Answer: B