[Question]: Barkley gets 10 new dog bones at the beginning of the month. After 5 months, he has 8 bones available and has buried the rest. How many bones has he buried?
[Answer]: He gets 10 new bones, every month for 5 months so he has 10 * 5 = 50 dog bones. He has 8 bones available which means he has buried 50 - 8 = 42 bones.
So the answer is 42.

[Question]: Carla's brush is 12 inches long. If Carmen's brush is 50% longer than Carla's brush, how long is Carmen's brush in centimeters? (There are 2.5 centimeters per inch.)
[Answer]: First find the length of Carmen's brush in inches: 150% * 12 inches = 18 inches. Then convert the length from inches to centimeters: 18 inches * 2.5 centimeters / inch = 45 centimeters.
So the answer is 45.

[Question]: Sam invested $10,000 and earned 20% interest compounded for 3 years. He then invested more until he had three times as much invested. The next year, he got a 15% return on his investment. How much money does he have now?
[Answer]:
After one year, Sam had $10,000 * 1.2 = $12,000. After two years, he had $12,000 * 1.2 = $14,400. After the third year, he had $14,400 * 1.2 = $17,280. He then invested more money until he had 3 * $17,280 = $51,840. The first year after that, he had $51,840 * 1.15 = $59,616.
So the answer is 59616.