Which expression is equivalent to 3.5x + 4.8? A
3.0.5x + 4.0.8
B
3x .0.5x +4.0.8
с
3 +0.5x + 4 + 0.8
D
3x + 0.5x + 4 + 0.8

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?