Bob and Tina ordered a pizza, but while Tina was changed her shirt, Bob at two-eighth of the pizza. When Tina come back she ate two-thirds of what was left. How much of the pizza did Tina eat?

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?