4. Let D be the set of all dogs, and let C = {(d, 0) < D X D | the dog d is a parent of the offspring o}.
Is C a function from D to D?

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?