Choose which scenario could be represented by the expression $14.99% a) The cost if you purchase 14 t-shirts at a cost of x dollars each

b) The cost if you purchase x t-shirts at a cost of $14.99 each

C) The sum of 14.99 and x

d) T difference between 14.99 and x​

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?