What is the ratio of 9 cm?

Solve 2^x=32 and rewrite this equation in a logarithmic form

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

Do you mind if you guys me with this question i’m on number 8