Jett bought a cow from the market at $600 and took it to his farm. He spent $20 every day to buy food. He also used $500 to vaccinate and deworm the cow. If he sold the cow for $2500 after 40 days, calculate the profit he made from selling back the cow to the market. Give the rationale and then the answer.
Let's think step by step. The total cost of food that the cow ate for the forty days is 40 * $20 = $800. To feed and maintain the health of the cow, the total expenses Jett used is $500 + $800 = $1300. With the expenses, Jett used $1300 + $600 = $1900 on the cow. If he sold the cow at $2500, Jett made a profit of $2500 - $1900 = $600.. The answer is: 600.

Barry, Thomas and Emmanuel are to share a jar of 200 jelly beans. If Thomas takes 10%, and Barry and Emmanuel are to share the remainder in the ratio 4:5 respectively, how many jelly beans will Emmanuel get? Give the rationale and then the answer.
Let's think step by step. 10% of 200 jelly beans is (10 / 100) * 200 = 20 jelly beans. Thomas takes 20 jelly beans leaving 200 - 20 = 180 jelly beans. 180 jelly beans are to be shared in the ratio 4:5 so each share is 180 / (4 + 5) = 20 jelly beans. Emmanuel gets 5 shares which is 5 * 20 = 100.. The answer is: 100.

Emery's family decides to travel for a weekend trip. They drive the first 100 miles in 1 hour. They stop at a McDonald's and then continue the rest of the journey for 300 miles. What's the total number of hours they traveled? Give the rationale and then the answer.
Let's think step by step. If the first 100 miles took one hour, then let's say the next 300 miles took x hours. if 100 miles = 1 hour, then 300 miles = x. To find the number of hours traveled for the 300 miles, x = 300 * 1 / 100. x = 3 hours. The total number of hours will be 3 + 1 = 4 hours.. The answer is: 4.