Respuesta :

Principal Amount = P = $500
Interest rate = r = 9% = 0.09
Time in years =  t = 4

Worth after 4 years = A(t)

Using the given formula:

[tex]A(t)=Pe^{rt} \\ \\ A(t)=500e^{0.09*4} =716.66[/tex]

Thus, the worth of the account after 4 years will be $716.66