Dak and Sally are buying a $349,000 house with a 30 year mortgage at 4.5% interest. Their monthly payment is $1768.33. What is their total payback and how much of that is interest? Assume only the minimum payment is made.

The new function g(x) represents the amount that will be in his account after x years.

Step-by-step explanation:

Tommy has $350 of his graduation gift money saved at home, which is defined by the function

The interest of a saving account is defined by the function is

After combining the two functions, his new function is

This function is multiplication of saving amount and interest function.

Therefore, the new function represents the amount that will be in his account after x years.