[Question]: The faucet in Betsy's bathroom is broken. Every minute it drips about 10 times. What amount of water is wasted during one hour if each drop contains 0.05 mL?
[Answer]: Every minute, 10 * 0.05 = 0.5 mL of water are wasted. Every hour, 0.5 * 60 = 30 mL of water are wasted.
So the answer is 30.

[Question]: A truck driver's heavy semi truck can go 3 miles per gallon of gas. The truck driver needs to put gas in his truck at one gas station, but wants to put the minimum amount he needs to get him to a much cheaper gas station 90 miles away. He already has 12 gallons of gas in his tank. How many more gallons does the truck driver need to put in his semi to make it to the cheaper gas station?
[Answer]: The truck driver can go 3 * 12 = 36 miles on the gas in his tank. He needs to go 90 - 36 = 54 more miles. Thus, the truck driver needs to put 54 / 3 = 18 more gallons of gas in his semi.
So the answer is 18.

[Question]: A retailer sells any shirt for the same price and any pair of pants for the same price, but the price of shirts and pants are not the same. Say you bought 2 shirts and 3 pairs of pants for $120 in total, then you realized you didn't need the extra pants. What's the price of 1 shirt at this place if when you returned all 3 pairs of pants you were refunded 25% of what you originally paid?
[Answer]:
If I paid $120 and I was refunded 25% for all the 3 pants, then that means I received 25% * 120 = $30. This means the total price of the 2 shirts was 120 - 30 = 90. The price of one shirt is thus 90 / 2 = 45.
So the answer is 45.