if log 7 = 0.845098, the number of digits in 7128 is  Choose the correct choice from the following:
A) 100
B) 120
C) 109
D) 280
E) 110
Explanation:   log(7128) = 128log(7) = 128 × 0.845098 ≈ 108.17   ie, its characteristic = 108   Hence, number of digits in 2128 = 108+1= 
<gadget id="calculator">108+1</gadget>
<output>109</output>
109   Answer: Option 280
<result>D</result>
if log 7 = 0.845098, the number of digits in 7128 is