Final answer:
In the equation a(x) = 500x + 1000, 500 represents the cost per commercial, x represents the start-up cost, and 1000 represents the number of computers manufactured.
Step-by-step explanation:
In the equation a(x) = 500x + 1000, the numbers 500, x, and 1000 represent the following:
- 500 represents the cost per commercial
- x represents the number of computers manufactured
- 1000 represents the start-up cost
Therefore, option (d) 500 represents the cost per commercial, x represents the start-up cost, and 1000 represents the number of computers manufactured is the correct representation of the equation in the given context.