John builds a box. The box is 26 inches by 26 inches by 14 inches. The walls are 1 inch thick on each side. How much is the internal volume in cubic feet? Give the rationale and then the answer.
Let's think step by step. The walls take away 2 * 1 = 2 inches from each dimension. So the longer sides are 26 - 2 = 24 inches. That is 24 / 12 = 2 feet. The smaller dimension is 14 - 2 = 12 inches. That is 12 / 12 = 1 foot. So the internal volume is 2 * 2 * 1 = 4 cubic feet.. The answer is: 4.

Terry spent 6$ for breakfast on Monday, twice as much on Tuesday, and on Wednesday Terry spent double what he did the previous two days combined. How much did Terry spend total? Give the rationale and then the answer.
Let's think step by step. Monday: 6$. Tuesday:6(2) = 12$. Wednesday:2(6 + 12) = 36$. Total:6 + 12 + 36 = 54$.. The answer is: 54.

Alani earned $45 for 3 hours of baby-sitting. At the same rate, for how many hours would she need to baby-sit to earn $75? Give the rationale and then the answer.
Let's think step by step. The rate is $45 / 3 = $15 / hr. She would need to baby - sit for $75 / $15 = 5 hours.. The answer is: 5.