A track has an inner loop that is 3/8 mile and an outer look that is 1/2. on saturday, melanie ran 2 1/4 miles on the inner loop. on sunday, she ran the same distance on the outer loop. how many laps did Melanie run around each loop?

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?