Darryl bought 7 hats. a week later half of all his hats were destroyed in a fire. there are only 24 hats left. how many hats did he start with?

Farnesene is a sesquiterpene. how many different isomers arising from double-bond isomerizations are possible? g

You receive 15% of the profit from a car wash how much money do you receive from a profit of 300

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 (%)