The pizza delivery person has 12 pizzas to deliver. If two of the stops are for orders of two pizzas and the rest are for single pizzas, how many minutes per stop does the delivery person need to average to deliver all of the pizzas in 40 minutes? Give the rationale and then the answer.
Let's think step by step. If two pizzas will be delivered at two of the stops, the total number of stops will be 12 - 2 = 10 stops. If there are 10 stops in 40 minutes, then the delivery person needs to average 40 / 10 = 4 minutes per stop.. The answer is: 4.

Mr. Alvarez spends $36 on diesel fuel each week. If the cost of diesel fuel is $3 per gallon, how many gallons of diesel fuel does Mr. Alvarez use in two weeks? Give the rationale and then the answer.
Let's think step by step. In a week, Mr. Alvarez uses $36 / $3 = 12 gallons a week. So in two weeks, he uses 12 x 2 = 24 gallons.. The answer is: 24.

Jillian, Savannah, and Clayton were collecting shells on the beach. Jillian collected 29, Savannah collected 17, and Clayton collected 8. They decided that they wanted to give the shells to two of their friends who had just arrived. They put their shells together and distributed them evenly to each friend. How many shells did each friend get? Give the rationale and then the answer.
Let's think step by step. The kids collected 29 + 17 + 8 = 54 shells. If they distribute the shells evenly between 2 friends, 54 / 2 = 27 shells for each friend.. The answer is: 27.