Solve for xxx. 2x+3\geq 7 \quad \maroonC{\text{ OR }} \quad 2x+9>112x+3≥7 OR 2x+9>11

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?