Please help ASAP, please!! show work if possible, you do not have to solve all of them.

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 (%)

The price of one share of a company’s stock declined $13.89 every day for 2.5 days what was the stocks total decline in price

Find the value of x to the nearest tenth. a. 4.5 b. 5.4 c. 6.3 d. 7.2