Consecutive integers are integers that are in order without skipping,.such as 3, 4, 5. find three consecutive numbers with a sum of 54. write an equation.
i know the answer is 17, 18, 19, but i don't know the equation. .

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?