9th grade math helpp me plz

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax

Sam is picking fruit from a basket that contains many different kinds of fruit. which set of events is independent?