Question

please help

Answer 1

http://screencast.com/t/xSznmkMXcS

Answer 2

\[x^{3.9}=11x^{3.2} \\ \\ \large \frac{x^{3.9}}{x^{3.2}}=11\]
Then use
\[\large x^m \div x^n = x^{m-n}\]

Answer 3

so then take ln to both sides right can u show the working fr tht

Answer 4

\[x^{0.7}=11 \\ \\ x=11^{\frac{1}{0.7}}\]