Final answer:
The equation to represent the total cost (C) of ADJ's services for h hours of work is C = 350 + 30h, combining the flat fee of $350 with the hourly rate multiplied by the number of hours.
Step-by-step explanation:
To represent the total cost (C) of ADJ's charges for h hours of work, you can use a simple linear equation that incorporates both the hourly rate and the flat fee. ADJ charges $30 per hour and additionally there is a one-time flat fee of $350 that does not vary with the number of hours worked. The equation that represents the cost is:
C = 350 + 30h
Here, h represents the number of hours worked, and 350 is the flat fee that must be paid regardless of the hours. The $30 per hour is represented by 30h, which is the variable part of the cost depending on the number of hours. To find the total cost C, you just multiply the total hours worked h by $30 and then add the flat fee of $350.