Ivory got four more riddles than Josh did. Taso got twice as many riddles as Ivory did. If Josh has 8 riddles, how many riddles does Taso have? Give the rationale and then the answer.
Let's think step by step. Ivory has 8 + 4 = 12 riddles. Taso has 12 * 2 = 24 riddles.. The answer is: 24.

Super Clean Car Wash Company cleans 80 cars per day. They make $5 per car washed. How much money will they make in 5 days? Give the rationale and then the answer.
Let's think step by step. Each day they will make 80 × $5 = $400. They will make $400 × 5 = $2000 in 5 days.. The answer is: 2000.

James gets paid $0.50/mile to drive a truck carrying hazardous waste. He has to pay $4.00/gallon for gas and his truck gets 20 miles per gallon. How much profit does he make from a 600 mile trip? Give the rationale and then the answer.
Let's think step by step. First find the total payment James receives: $0.50 / mile * 600 miles = $300. Then find how many gallons of gas he needs to buy: 600 miles / 20 miles / gallon = 30 gallons. Then multiply that number by the price of gas per gallon to find the total cost of the gas: $4.00 / gallon * 30 gallons = $120. Then subtract that amount from James' earnings to find his profit: $300 - $120 = $180.. The answer is: 180.