Amy rolls a number cube ten times and gets 3 four times! if she rolls the number cube 240 times, how many times should she get a 3 (hint: should her results be used, or the theoretical 20 40 80 96

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