Solve $3^x=27$3x=27.
Solve the equation $10^x=0.01$10x=0.01.
Solve for the value of $y$y in the equation:
$9^y=27$9y=27
Solve $\left(\sqrt{2}\right)^k=0.5$(√2)k=0.5.
use exponential functions and their derivatives to solve practical problem