If log50=1.699 then what is the value of log (100) 50?

a. 0.0849

b. 169.9

c. 0.01699

d. 0.849

I guess you are using the decimal logarithm (base 10), if so:

log (100 x 50) = log 100 + log 50. (log50 = 1.699 given)

log100 + 1.699, but log100 = log 10² = 2

hence log (100 x 50) = 3.699