The tallest man ever recorded was robert wadlow, who was 272 cm tall. the tallest women on record was zeng jinlian? her height was 91% of wadlows's height.(round to the nearest cm).

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?