You and your 3 friends order a large pizza for $12 each additional toppings cost $1.75 and you decide to get pepperoni, olives’ peppers’ and mushrooms. If you also have to pay 5% tax how much would each of you need to pay to cover the total price.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?