Josue planted a tree in his backyard that grows at the rate of 2 feet per week. If the tree is currently 10 feet tall, what would be the tree's total height after 4 months (assuming each month is 4 weeks long)? Give the rationale and then the answer.
Let's think step by step. Since a month has four weeks, the tree will increase its height by 2 feet for 4 * 4 = 16 weeks after four months of growing. Since the tree grows at 2 feet per week, after 16 weeks, the tree would have increased its height by 2 * 16 = 32 feet. If the tree is currently 10 feet tall, its height after four months will be 10 + 32 = 42 feet.. The answer is: 42.

Carlos has some gold quarters. If he spends them in a store, they are worth the regular amount. If he melts them down, he can get $100 per ounce. Each quarter weighs 1/5 of an ounce. How many times more money would he get from melting them down instead of spending them in a store? Give the rationale and then the answer.
Let's think step by step. If he melts them down, five quarters equals $100 because 1 / (1 / 5) = 5. If he spends those five quarters they are worth $1.25 because 5 x .25 = 1.25. They are worth 80 times more melted down because 100 / 1.25 = 80.. The answer is: 80.

Ruel has four books of 10 stamps and six books of 15 stamps. How many stamps does Ruel have? Give the rationale and then the answer.
Let's think step by step. Ruel has a total of 4 x 10 = 40 stamps from the four books. He also has 6 x 15 = 90 stamps from the six books. Therefore, he has a total of 40 + 90 = 130 stamps.. The answer is: 130.