Given:

Question

log(10,5)=a, log(10,3)=b, log(10,2)=c

Find: log(30,8)

Answer 1

not familiar with your notation

does log(30,8) mean log₃₀ 8 ?

Answer 2

Yes

Answer 3

log(30,8) = log8/log30

Since the base on the right does not matter, we can use base 10, giving us

3log2/(log2+log3+log5)
= 3c/(c+b+a)

Answer 4

Thanks Steve