You have $527.57 in your wallet. You make some extra cash by selling sno-cones in front of your house. You buy a new PS5 system and get a great deal since it only cost $429.32. You now have $301.74 left. Write and solve an equation that shows how much money you made selling sno-cones.

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?