if log 198.9 = 2.2987 , then the characteristic of log 198.9= and mantissa of log 198.9 = _______

If log 27 = 1.431, then the value of log 9 is:

If log27=1.431, then the value of log 9 is

Prove that log_2 log_3 9=1

if 2^(log_(3)9) + 25 log_(9)3 = 8 log_(x)9 then x= _______

The half-life of ""^(198) Au is 3 days. If atomic weight of ""^(198) Au is 198 g/mol then the activity of 2 mg of ""^(198") Au is [in disintegration/second] :

log ( 4x ^(2) - 9)