If you work for an hourly wage, your gross pay is a function of the number of hours that you work. Your hourly wage is $8 per hour. Assuming you work 40 hours per week, what is the practical domain and the practical range of the function?
Answer
A
The practical domain is 0 through 8. The practical range is 0 through 32.
B
The practical domain is 0 through 320. The practical range is 0 through 40.
C
The practical domain is 0 through 40. The practical range is 0 through 320.
D
The practical domain is 0 through 32. The practical range is 0 through 8.
Explanation
The practical domain is the possible number of hours worked in a week: from 0 to 40 hours. Gross pay is $8 times the number of hours, so the pay ranges from $8 × 0 = $0 to $8 × 40 = $320. Therefore, the practical domain is 0 through 40 and the practical range is 0 through 320, choice c.
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