Select all the equations that represent a line that is perpendicular to the line with equation y = 2x − 8. A. y = 12x + 1
B. y = −12x + 1
C. x + 2y = 5
D. −x + 2y = −3
E. −x − 2y = 9

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?