Stand a $3.75 for 2.5 lbs stand b $5.60 for 1.75 lbs stand c $5.40 for 1.8 lbs stand d $9.35 for 2.2 lbs which stand offers the best deal?

The radius of the base of a cylinder is 10 centimeters, and its height is 20 centimeters. a cone is used to fill the cylinder with water. the radius of the cone's base is 5 centimeters, and its height is 10 centimeters.

Anyone know? will mark brainliest if correct!

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 (%)