After spending $3,450 for tables and $3,950 for chairs, a convention center manager finds that the total is 4% more than he spent on tables and chairs last year. to the nearest dollar, find the amount that he spent last year.

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?