Michael picks three different digits from the set { } 12345 and forms a mixed number by placing the digits in the spaces of . The fractional part of the mixed number must be less than 1. (For example, 4 2 3 ). What is the difference between the largest and smallest possible mixed number that can be formed?

Jake volunteers to out his younger brother's basketball team in his free time. one of his tasks is to ensure that all the basketballs have enough air in them. given that a properly inflated basketball measures 8.8 inches across, what is the total volume of air inside six of jake’s basketballs? assume that the wall of each ball is infinitely thin.