Please help. If I don’t get a good grade on this I will fail the grade. Here’s the problem. You need to find the length and width of every room.

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

This is about circle theorems. someone asap : (

Select the correct answer and solve for y