CPM Homework Help : CCA2 Problem 10-23

Compute without a calculator Without using a calculator, simplify and evaluate each of the following log expressions. Your result should be an expression without logarithms.

log $(4) +$ log $(25)$
Hint (a):
These have the same base.
How does that help you to simplify?

$\frac { 7 ^ { \operatorname { log } _ { 7 } ( 3 ) } } { \operatorname { log } _ { 5 } 5 ^ { 4 } }$
Answer (b):
$\frac{3}{4}$