How did they get 72?

If i have a 24 in loaf of bread and i cut it into two pieces one 9 in how long was the other

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Mr. thompson took five of his children to the bowling alley the cost for children 12 and older is 350 the cost of four children under 12 inch to 25 he spent a total of 1625 how many of his children are 12 and order