Answer: There would be $507.39 in the account after 90 days.
Explanation:
Since we have given that
Principal = $500
Rate of interest = 6%
Number of days = 90 days
As we know that "Simple interest":
So, Amount = Principal + Interest
Amount = $500 + $ 7.39
Amount = $507.39
Hence, There would be $507.39 in the account after 90 days.