## College Algebra 7th Edition

(a) $2$ (b) $2$ (c) $10$
RECALL: (1) $\log_b{b}=1$ (2) $\log_b{1}=0$ (3) $\log_b{b^x}=x$ (a) Write $36$ as $6^2$, then use rule (3) above to obtain: $=\log_6{6^2} \\=2$ (b) Write $81$ as $9^2$, then use rule (3) above to obtain: $=\log_9{9^2} \\=2$ (c) Use rule (3) above to obtain: $=\log_7{7^{10}} \\=10$