Solve (x-4)^2 =5.
A. x= -4 +/- 5
B. x= 9 and x= -1
C. x= 5 +/- 4
D. x= 4 +/- 5

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?