A window washer charges an hourly fee of $8.50 plus an additional fee of $0.50 for each window washed.
Which of the following expressions accurately represents the number of dollars charged by the window washer to work 4 hours and wash x windows?
A . 4 + 8.50 + 0.50x
B . 4(8.50) + 0.50x
C . 4(0.50x) + 8.50
D . 4(8.50)(0.50x)
E . 4(8.50 + 0.50x)
Answer: B