Which choice is equivalent to the fraction below when x is an appropriate value? Hint: Rationalize the denominator and simplify.
√12 divided by √3+3

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