Harry is counting the hours that he sleeps. On Monday night, he sleeps for 8 hours. On Tuesday night, he sleeps for 7 hours. On Wednesday night, he sleeps for 8 hours. On Thursday night, he sleeps for 10 hours. On Friday night he sleeps for 7 hours. What is the average number of hours that Harry sleeps in one night? Give the rationale and then the answer.
Let's think step by step. Across Monday through Friday, the total number of hours Harry sleeps is 8 + 7 + 8 + 10 + 7 = 40 hours. The total number of days from Monday through Friday is 5 days. The average number of hours Harry sleeps in one night is 40 / 5 = 8 hours.. The answer is: 8.

A developer was buying land. He bought 4 acres at $1,863 per acre. He then split the land he purchased into 9 lots. How much should he sell each lot for just to break even? Give the rationale and then the answer.
Let's think step by step. His purchase cost is 4 acres * $1863 = $7452. He divided the land into 9 plots, so the price per lot would be $7452 / 9 = $828.. The answer is: 828.

Melody planted sunflowers from two different seed packets. She found that the sunflowers from Packet A were 20% taller than the sunflowers from Packet B. If the sunflowers from Packet A were 192 inches tall, how tall were the sunflowers from Packet B? Give the rationale and then the answer.
Let's think step by step. The height of the sunflowers from Packet A is the same as the height of the sunflowers from Packet B + 20%. If Y represents the height of the sunflowers from Packet B, Y + 0.20Y = the height of sunflowers from Packet A. We know the height of the sunflowers from Packet A is 192 inches = Y + 0.20Y or 1.2Y. To figure out Y, we would divide both sides of the equation by 1.2, like this: 192 / 1.2 = 1.2Y / 1.2 or 160 = Y.. The answer is: 160.