Can you please answer all three of these questions. Nike made a shoe for $65.75. Nike decided to mark the shoe up by 55%. How much will this shoe be sold for in the stores?

I paid $399.99 dollars for an iPad, including sales tax. The original price of the iPad was $375. What percent of sales tax did I pay?

I want to build a pool. My friend's pool is 25 feet long by 35 feet wide. If I make my pool 50 feet long, how wide will my pool need to be to make it look the same as my neighbors?