Log 16=4 x

You can also do this:

log(16) = 4x

(1/4)log(16) = x

But any multiplied can go inside as an exponent:

(1/4)log(16)  =  log(16^(1/4))

And, since 16 = 2^4:  log(16^(1/4))  =  log( (2^4) ^(1/4) )  =  log(2)

Log 16=4 x

Divide  both sides by 4

x = log 16/4 = about .301

Yep...I definitely like your approach better, geno....mine is only approximate.....