Answer: Amount that the Smith family need to pay for the meal including tax and tip = 53.47.
Explanation:
Since we have given that
Price of the meal = 43.45
Rate of sales tax = 7%
Amount becomes after the sales tax is given by

Rate of tips over meal and sales = 15%
Amount of tips is given by

So, Amount becomes

Hence, Amount that the Smith family need to pay for the meal including tax and tip = 53.47.