Question

[(0,3)la2 ]la3*x=(0,09)la 4

Answer 1

$\displaystyle [(0,3)^2]^3 \cdot x=0,09^4 \\ (0,09)^3 \cdot x=0,00006561 \\ 0,000729x=0,00006561 \\ x= \frac{0,00006561}{0,000729} \\ x=0,09$