Does each function describe exponential growth or decay?

drag and drop the equations into the boxes the correctly complete the table:

growth:

decay:

y= 1/2(1+0.3)^t

y= 0.3(0.95)^t

y= ((1+0.03)^1/2)^2t

y= 200(0.73)^t

y= 4(1/2)^t

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?