Answer the following question.
Jack leaves his bathtub's faucet dripping at a rate of 40 ml/minute. Water evaporates from the bathtub at a rate of 200 ml/hour. If he leaves the water running for 9 hours, then dumps out 12 liters, how many milliliters of water are left in the bathtub?
Step-by-step reasoning process: First find how much water fills the bathtub per hour: 40 ml / minute * 60 minutes / hour = 2400 ml / hour. Then subtract the water that evaporates to find the total amount of water added per hour: 2400 ml / hour - 200 ml / hour = 2200 ml / hour. Then multiply that amount by the number of hours to find the total amount of water in the tub: 2200 ml / hour * 9 hours = 19800 ml. Then find the number of milliliters in 12 liters: 12 liters * 1000 ml / liter = 12000 ml. Then subtract the water Jack removes from the total amount of water to find the remaining amount of water: 19800 ml - 12000 ml = 7800 ml.
The answer is 7800.

Answer the following question.
Tom can type 90 words a minute. A page is 450 words. How long would it take him to type out 10 pages?
Step-by-step reasoning process: He can type out 1 page in 450 / 90 = 5 minutes. So it would take 5 * 10 = 50 minutes.
The answer is 50.

Answer the following question.
Blake bought 4 lollipops and 6 packs of chocolate. If each lollipop costs $2 and a pack of chocolate costs the same as four lollipops, how much change will Blake get back if he gave the cashier 6 $10 bills?
Step-by-step reasoning process: Four pieces of lollipop cost $2x 4 = $8. A pack of chocolate costs $8 so 6 packs cost $8 x 6 = $48. The total amount that she needs to pay is $8 + $48 = $56. Blake gave the cashier $10 x 6 = $60. So, her change is $60 - $56 = $4.
The answer is 4.

Answer the following question.
Stan can type 50 words per minute. He needs to write a 5-page paper. Each page will contain 400 words. Each hour that he types he needs to drink 15 ounces of water. How much water does he need to drink while writing his paper?
Step-by-step reasoning process: Stan needs to write 2,000 words because 5 x 400 = 2,000. This will take him 40 minutes because 2,000 / 50 = 40. He drinks 1 / 4 an ounce per minute because 15 / 60 = 1 / 4. He will drink 10 ounces of water while writing the paper because 40 x (1 / 4) = 10.
The answer is 10.