There are 20 guests at a party. the host has 8 gallons of punch. each guests will drink 2 cups of punch. how much punch will be left over at the end of the party?

The answer is 5.5 gallons. One cup is 0.0625 gallons. If each guest will drink 2 cups of punch, 20 guests will drink: 20 * 2 cups = 40 cups = 40 * 0.0625 gallons = 2.5 gallons. So, 20 guests will drink 2.5 gallons. The host had 8 gallons and after the party he will have: 8 gallons - 2.5 gallons = 5.5 gallons.