Question

Quotient property:
logb
x
y
= logbx − logby

Given log630 ≈ 1.898 and log62 ≈ 0.387,

log615 =
.

Answer 1

Use 15 = 30/2 and the quotient property:
log6 15 = log6(30/2) = log6 30 − log6 2 = 1.898 − 0.387 = 1.511.