Answer this question:Tom decided to go on a trip. During this trip, he needs to cross a lake, which in one direction takes 4 hours. During this time, Tom needs an assistant to help him with the crossing. Hiring an assistant costs $10 per hour. How much would Tom have to pay for help with crossing the lake back and forth?
Crossing the lake two times (back and forth) would take 4 * 2 = 8 hours. So Tom would need to pay an assistant 8 * 10 = $80.
The answer is 80.

Answer this question:Jangshe spent $610 on 7 pieces of clothing. One piece was $49 and another piece was $81. If the other pieces were all the same price, how many dollars was one of the other pieces?
610 - 49 = 561, and then 561 - 81 = 480. There were 7 - 2 = 5 other pieces. 480 / 5 = 96 dollars. The other 5 pieces cost $96 each.
The answer is 96.

Answer this question:Mr. Banks and Ms. Elizabeth are entrepreneurs who invest in different income streams and earn revenue from the investments. From each of his eight investments, Mr. Banks received $500 in revenue. Ms. Elizabeth also received $900 from each of her 5 investment streams. How much more money did Ms. Elizabeth make from her investments than Mr. Banks?
Since Mr. Banks had 8 investment streams and each brought in a revenue of $500, he earned 500 * 8 = $4000 from all of his investments. Ms Elizabeth also received $900 * 5 = $4500 in revenue from her 5 income streams,. The total amount of money that Ms. Elizabeth made more than Mr. Banks is $4500 - $4000 = $500.
The answer is 500.

Answer this question:Gina is figuring out how much she'll have to spend on college this year. She's taking 14 credits that cost $450 each, and she has to pay $120 for each of her 5 textbooks plus a $200 facilities fee. How much will Gina spend in total?
First, find out how much will Gina pay for tuition by multiplying her number of credits by the cost per credit: 14 * 450 = $6300. Then find out how much she pays for textbooks by multiplying the number of books by the cost per book: 5 * 120 = $600. Finally, add up all Gina's costs to find the total of 6300 + 600 + 200 = $7100.
The answer is 7100.