The velocity v of an object rolled down an inclined plane is given by the formula v=39d where d is the distance the object has rolled solve the formula for d

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 (%)