Hello. Can someone please help me with this

Evaluate the following expression 1/3^2

Anew shopping mall is gaining in popularity. every day since it opened, the number of shoppers is 5% more than the number of shoppers the day before. the total number of shoppers over the first 10 days is 1258 how many shoppers were on the first day?

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?