The domain of the equation are all the possible values of the independent variables that would make the equation reasonable, possible or true. In this item, the independent variable is r. This could take a value of 0 up to the point when m is equal to zero.
m = 30 - 3r = 0
r = 10
The domain is therefore [0, 10].
The range is the value of the dependent variable which would be from 0 to the point when no video game is played. This is, [0, 30].
The function is discrete because r and m cannot take every value in the number line.
The answer to your question is 13.2
Answer:
Mean = 4
Step-by-step explanation:

You want to multiply 40 hours by the regular hourly pay which would be $9.14,
9.14*40= 365.6
Overtime is generally 1.5 times regular pay so take 9.14*1.5= 13.71 and this would be your overtime hourly rate
Regular hourly rate (1x) : $9.14
Overtime hourly rate (1.5x): $13.71
Take your 8 hours of OT and multiply it by 13.71
13.71*8= 109.68
Add 365.6 and 109.68 to get a final answer of 475.28. The answer would've been C