8. SAVINGS The table at the right shows the savings account balance of each of the Alvarez siblings.
a. Write an equation to find the amount of money
in Petros's account if the total of all of
their accounts is $148.
b. Solve the equation from part a to find the
amount of money in Petros's account.

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?