Aliaa is skating down a ramp. The wheels on her skateboard have diameters of 60mm. What is the distance aliia travels when her skateboard wheels make 20 revolutions? Round your answer to the nearest mm

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?