7,000lbs times what would equal 3.5 tons

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

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 (%)

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd