Question: Every day, while going to school, Shane drives a total of 10 miles. Calculate the total distance he drives in an 80 day semester from home to school and back.
Answer: To go to school and back, Shane drives 2 * 10 = 20 miles per day. In 80 days of a semester, he drives for 80 * 20 = 1600 miles. The answer is 1600.

Question: Johnny has been playing guitar for a while now. He practices the same amount each day. As of 20 days ago he had half as much practice as he has currently. How many days will pass before Johnny has 3 times as much practice as he does currently?
Answer: If Johnny had half as much practice as he currently has as of 20 days ago, this means he has 20 * 2 = 40 days worth of practice currently. Therefore, to have three times as much practice as he currently has, he'd need to practice for 40 * 3 = 120 days. Since he's already practiced for 40 days, this means he needs to practice or 120 - 40 = 80 more days. The answer is 80.

Question: Cally and Danny washed their clothes. Cally has 10 white shirts, 5 colored shirts, 7 pairs of shorts, and 6 pairs of pants, while Danny has 6 white shirts, 8 colored shirts, 10 shorts, and 6 pairs of pants. How many clothes did they wash?
Answer: They washed 10 + 6 = 16 white shirts. They washede 5 + 8 = 13 colored shirts. They washed 7 + 10 = 17 shorts. They washed 6 + 6 = 12 pants. Therefore, Cally and Danny washed a total of 16 + 13 + 17 + 12 = 58 clothes. The answer is 58.

Question: Randy just turned 12 and started playing the piano. His friend Sheila told him about the 10,000-hour rule which says, after 10,000 hours of practice, you become an expert or master in your field. If Randy wants to become a piano expert before he is 20, how many hours a day will he need to practice if he practices every day, Monday Friday, and takes two weeks off for vacation each year?
Answer:
Randy has 20 12 = 8 years until he is 20. He must practice 10,000 hours / 8 years = 1,250 hours a year to become an expert. There are 52 weeks in a year 2 weeks of vacation Randy plans to take = 50 weeks of practice for Randy. Randy will practice Monday Friday, which is 5 days a week, so 50 weeks x 5 days = 250 days of practice each year. Randy will need to practice 1250 hours / 250 days = 5 hours each day. The answer is 5.