In a frequency distribution, the mid-value of a class is 12 and its width is 6. the lower
limit of the class is:
(a) 6 (b) 9 (c) 12 (d) 18

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