Randi had surgery on her knee. Right after the surgery
she could bend her knee only 30° from a horizontal
position. After six weeks of physical therapy, she can
bend it 108°. How many more degrees can she move
her knee after therapy? Explain.
Doesn’t the answer have to be in a degree

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?