I've been stuck on this for days

Question

3000 is deposited  in an account that pays 5% annual interest for 10 years.  How much more would be in the account  if the  interest were compounded continusly rather than quarterly 

Answer 1

quarterly    A=P(1+r/(4))^4t

continuously  A=pe^rt

 

quarterly   A=3000(1+ .05/4)⁴⁰ =3000(1.0125)⁴⁰ =4930.86

conintuously A=3000e^0.05(10) =4946.16

4946.16-4930.86 = $15.30 more is earned by continuous compounding than by quarterly compounding