He got 300 * 2 = $600. So he got 600 / 20 = 30 bills.
The answer: 30
Reverse engineering the question: Tye goes to two different banks and withdraws $300 from each bank. If he got it all in 20 dollar bills how many bills did he get?

First find the area of one of the long walls: 30 feet * 12 feet = 360 square feet. Then double that amount since there are two walls: 360 square feet * 2 = 720 square feet. Then find the area of the short wall: 20 feet * 12 feet = 240 square feet. Then add that area to the area of the two long walls to find the total area: 720 square feet + 240 square feet = 960 square feet.
The answer: 960
Reverse engineering the question: James is building a hall of mirrors. Three of the walls will be completed covered with glass. If two of those walls are 30 feet by 12 feet and the third is 20 feet by 12 feet, how many square feet of glass does he need?

First find the total amount of fertilizer the horses produce per day: 5 gallons / horse * 80 horses = 400 gallons. Then multiply the number of acres of farmland by the number of gallons per acre to find the total amount of fertilizer needed: 400 gallons / acre * 20 acres = 8000 gallons. Then divide the total amount of fertilizer needed by the amount of fertilizer produced per day to find the number of days needed to collect fertilizer: 8000 gallons / 400 gallons / day = 20 days. Then divide the total number of acres Janet needs to cover by the number of acres she can cover per day to find how many days it takes her to cover them all: 20 acres / 4 acres / day = 5 days. Then add the time to collect the fertilizer to the time to spread it to find the total time: 5 days + 20 days = 25 days.
The answer: 25
Reverse engineering the question: Janet uses her horses' manure as fertilizer. One horse produces 5 gallons of fertilizer per day. Once Janet has collected enough fertilizer, she'll spread it over 20 acres of farmland. Each acre needs 400 gallons of fertilizer and Janet can spread fertilizer over 4 acres per day. If Janet has 80 horses, how long will it take until all her fields are fertilized?

Maria has 4 + 5 = 9 quarters. The number of dollars from the quarters is 9 * $0.25 = $2.25. The number of dollars from the dimes is 4 * $0.10 = $0.40. The number of dollars from the nickels is 7 * $0.05 = $0.35. The total number of dollars is $2.25 + $0.40 + $0.35 = $3.
The answer: 3
Reverse engineering the question:
Maria has 4 dimes, 4 quarters, and 7 nickels in her piggy bank. Her mom gives her 5 quarters. How much money, in dollars, does Maria have now?