Answer this question:At Mario's barbershop haircuts are 50% more expensive during the weekends. If Mario paid $18 for his last haircut on Monday, how much he would have paid the day before?
Mario's $18 cut on Monday would have been 50% more expensive on Sunday or $18 * 50% = $9 more expensive. That means he would have paid $9 more on Sunday than what he paid ($18) on Monday or $9 + $18 = $27.
The answer is 27.

Answer this question:To make a cherry pie, Veronica needs 3 pounds of pitted cherries. There are 80 single cherries in one pound of cherries.  It takes 10 minutes to pit 20 cherries. How many hours will it take Veronica to pit all the cherries?
There are 80 cherries in a pound and she needs 3 pounds to make a pie so she needs 80 * 3 = 240 cherries. It takes her 10 minutes to pit a unit of 20 cherries. She has 240 / 20 = 12 units of cherries to pit. It takes 10 minutes to pit a unit of cherries and she has 12 units so it will take her 10 * 12 = 120 minutes. 60 minutes are in 1 hour and it takes her 120 minutes so that’s 120 / 60 = 2 hours.
The answer is 2.

Answer this question:John jogs at a speed of 4 miles per hour when he runs alone, but runs at 6 miles per hour when he is being dragged by his 100-pound German Shepherd dog. If John and his dog go on a run together for 30 minutes, and then John runs for an additional 30 minutes by himself, how far will John have traveled?
John runs at 6 miles per hour for 0.5 hours, for a distance of 6 * 0.5 = 3 miles. Then John runs at 4 miles per hour for 0.5 hours, for a distance of 4 * 0.5 = 2 miles. In total, John runs 3 + 2 = 5 miles.
The answer is 5.

Answer this question:John trains for ultramarathons. He starts only able to run 8 hours straight but eventually increases that by 75%. He also increases his speed of 8 mph by 4 mph. How far can he run now?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
He increases the time he can run by 8 * .75 = 6 hours. So he can now run 8 + 6 = 14 hours. His speed is now 8 + 4 = 12 mph. So he can run 14 * 12 = 168 miles.
The answer is 168.