If log10 7=a, then log10(1/70) is equal to
–(1+a)
(1+a)-1
a/10
1/10a
Correct Answer : A
If a=bX, b=cY and c=aZ, then the value of XYZ is equal to
If log10 2=0.3010, then value of log10 80 is
If log 2=0.30103, the number of digits in 450 is