Whats the perimeter to 14m ,10m ,11m , and 6m​

Me because some of question i don’t understand

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

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