Peter is eating chips. Each chip is 10 calories. A bag has 24 chips and costs $2. If he wants to eat 480 calories, how much does he have to spend on chips? Give the rationale and then the answer.
Let's think step by step. Each bag has 240 calories because 24 x 10 = 240. He needs two bags because 480 / 240 = 2. It will cost $4 because 2 x 2 = 4.. The answer is: 4.

Michael makes birdhouses to sell at craft shows. He charges $22 for each large birdhouse, $16 for each medium birdhouse, and $7 for each small birdhouse. This week, he sold 2 large birdhouses, 2 medium birdhouses, and 3 small birdhouses. How much money, in dollars, did he make this week? Give the rationale and then the answer.
Let's think step by step. Michael sold 2 large birdhouses for $22 each, so he made 2 * $22 = $44 from large birdhouse sales. Michael also sold 2 medium birdhouses for $16 each, so he made 2 * $16 = $32 from medium birdhouse sales. Michael sold 3 small birdhouses for $7 each, so he made 3 * 7 = $21 from small birdhouse sales. Since Michael made $44 from large birdhouse sales, $32 from medium birdhouse sales, and $21 for small birdhouse sales, he made $44 + $32 + $21 = $97 total this week.. The answer is: 97.

There are 84 people waiting in line to ride a roller coaster at an amusement park.  The roller coaster has 7 cars, and each car seats 2 people.  How many times will the ride operator have to run the roller coaster to give everyone in line a turn? Give the rationale and then the answer.
Let's think step by step. Each run will hold 7 * 2 = 14 people. The ride will have to run 84 / 14 = 6 times.. The answer is: 6.