if log 1087.5 = 3.9421 , then the number of digits in ( 875 ) 10 is ?
"x = ( 875 ) 10 = ( 87.5 x 10 ) 10 therefore , log 10 x = 10 ( log 1087.5 + 1 ) = 10 ( 3.9421 + 1 ) = 10 ( 4.9421 ) = 49.421 x = antilog ( 49.421 ) therefore , number of digits in x = 50 . answer : d"
add(multiply(const_4, 3.9421), divide(log(const_100), log(const_10)))