[" If "log198.9=2.2987" ,then the characteristic of "],[log198.9=" and mantissa of "log198.9" : "]

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

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] :

IF x=198! then value of the expression 1/(log_2x)+1/(log_3x)+...+1/(log_198 x) equals

Prove that log_2 log_3 9=1

Prove that log_3 2=log_9 4=log_27 8

If int_0^(pi/2) sintheta log sintheta d theta =log (A/(198e) then the last digit of A is equal to