Write an inequality for each sentence below and then solve and check it. a. The sum of wand nine is less than 18.
b. g decreased by 25 is at most five.
c. The difference of a number and six is no less than 15.
d. 14 is not equal to the sum of ten and a number.
e. 25 plus a number is at least 13.

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?