20. Exponential and Logarithmic Functions

Rewrite the log expression as a sum of multiple logs. Further simplify if possible.

$lo{g}_{10}(5\cdot 7)$

Rewrite the log expression as a sum of multiple logs. Further simplify if possible.

${\log }_{4}4x$

Rewrite the log expression as a sum of multiple logs. Further simplify if possible.

${\log }_{3}10mn$

Rewrite the sum as a single logarithm. Further simplify if possible.

${\log }_{3}4+{\log }_{3}9$