Jenna is hemming her prom dress. The dress's hem is 3 feet long. Each stitch Jenna makes is 1/4 inch long. If Jenna makes 24 stitches per minute, how many minutes does it take Jenna to hem her dress?
Let's think: First find how many inches the hem is by multiplying the length in feet by the number of inches per foot: 3 feet * 12 inches / foot = 36 inches. Then divide the length in inches by the length of each stitch to find how many stitches Jenna makes: 36 inches / .25 inches = 144 stitches. Then divide the number of stitches by Jenna's stitching rate to find how long it takes her: 144 stitches / 24 stitches / minute = 6 minutes.. The answer is: 6.

At the polar bear club, Jerry and his three friends, Elaine, George, and Kramer, took turns jumping into a swimming pool filled with freezing-cold water. Jerry was in the pool for 3 minutes before becoming too cold to remain in the cold water. Elaine stayed in the pool for twice as long as Jerry. George could only stay in the pool for one-third as long as Elaine. And Kramer, who accidentally locked himself in the bathroom, could not find the pool. What is the combined total of minutes that Jerry and his friends were in the cold water?
Let's think: Elaine was in the pool for 2 * 3 = 6 minutes. George was in the pool for 6 / 3 = 2 minutes. Kramer never found the pool and thus swam for 0 minutes. In total, Jerry and his friend were in the cold water for 3 + 6 + 2 + 0 = 11 minutes.. The answer is: 11.

James gets bored with his game so decides to play a different one. That game promises 100 hours of gameplay but 80% of that is boring grinding. However, the expansion does add another 30 hours of enjoyable gameplay. How much enjoyable gameplay does James get?
Let's think: The first game was 100 * .8 = 80 hours of grinding. So it was 100 - 80 = 20 hours of good gameplay. The expansion brought the time of good gameplay to 20 + 30 = 50 hours.. The answer is: 50.

A truck driver has to spend $2 per gallon of gas. She can drive 10 miles per gallon. She drives at a rate of 30 miles per hour. If she is paid $.50 per mile, how much money does she make if she drives for 10 hours?
Let's think:
The truck driver drives for 10 hours at 30 miles per hour, so she drives 10 * 30 = 300 miles. Therefore, she needs 300 / 10 = 30 gallons of gas. This will cost her 30 * $2 = $60. She will make 300 * $.50 = $150. Thus, after paying for gas, she will make $150 - $60 = $90.. The answer is: 90.