On a tough week, Haji's mother sells goods worth $800, which is half the amount she sells on a good week. What's the total amount of money she makes if she has 5 good weeks and 3 tough weeks?
Let's think: If on a tough week she sells half what she sells on a good week, then on a good week she sells 800 * 2 = 1600 dollars. If she had 5 good weeks, the amount is 5 * 1600 = 8000 dollars. During the 3 tough weeks, she sells 3 * 800 = 2400 dollars. The total amount she sold in both weeks is 2400 + 8000 = 10400 dollars.. The answer is: 10400.

A person borrowed an amount of money for a year at an interest rate of 12%. If the total interest is $1500, what was the original borrowed amount?
Let's think: Let X be the price of the borrowed amount. The interest is X * .12 = $1500. So the borrowed amount is X = $1500 / .12 = $12500.. The answer is: 12500.

9 years from now, John will be 3 times as old as he was 11 years ago. How old is he now?
Let's think: Let J represent John’s age. We have J + 9 = 3(j − 11). So, J + 9 = 3J − 33. So, 9 = 2J − 33. So, 42 = 2J. Which means that John’s age is J = 42 / 2 = 21.. The answer is: 21.

Hank is raising money for the local homeless shelter. Hank makes $100 in a carwash and donates 90% of the proceeds to the local homeless shelter. Hank makes $80 in a bake sale and donates 75% of the proceeds to the local homeless shelter. Then he makes $50 mowing lawns and donates 100% of the proceeds to the local homeless shelter. How much money does Hank donate in total?
Let's think:
From the carwash, Hank donates $100 * 0.90 = $90. From the bake sale, Hank donates $80 * 0.75 = $60. From mowing lawns, Hank donates $50 * 1.00 = $50. Hank donates a total of $90 + $60 + $50 = $200.. The answer is: 200.