Question: Jack bought an ice cream cone before jogging to the beach. If the ice cream cone will melt in 10 minutes, the beach is 16 blocks away, and each block is 1/8th of a mile, how fast does Jack need to jog (in miles per hour) to get to the beach before the ice cream melts?
Answer: First find the total distance to the beach: 16 blocks * 1 / 8 mile / block = 2 miles. Then find how long in hours Jack has to get to the beach: 10 minutes / 60 minutes / hour = 1 / 6 hour. Then divide the distance Jack needs to cover by the time in hours he has to find how fast he needs to jog: 2 miles / 1 / 6 hour = 12 miles / hour. The answer is 12.
[Question]Farmer Randy has 1700 acres of cotton he needs to have planted in 5 days. With a crew of 2 tractors working for 2 days and then a crew of 7 tractors working for another 3 days, how many acres of cotton per day does each tractor need to plant to meet their planting deadline?
[Answer]With 2 tractor teams working for 2 days, this is like 2 * 2 = 4 days worth of work by a single tractor, which they call tractor days. With 5 tractor teams working for 4 days, this is 7 * 3 = 21 tractor days. In total, the effort of all the tractor teams is 4 + 21 = 25 tractor days. If they need to plant 1700 acres with their 25 tractor days, then each tractor team needs to plant 1700 / 25 = 68 acres of cotton per day. The answer is 68.
Q: There are 480 zombies in the shopping mall. If the number of zombies doubled every day, how many days ago were there less than 50 zombies in the mall?
A: First find how many zombies there were one day ago: 480 zombies / 2 = 240 zombies. Then find how many zombies there were two days ago: 240 zombies / 2 = 120 zombies. Then find the number of zombies there were three days ago: 120 zombies / 2 = 60 zombies. Then find the number of zombies there were four days ago: 60 zombies / 2 = 30 zombies, which is less than 50, so there were less than 50 zombies 4 days ago. The answer is 4.
Question: Renaldo drove 15 kilometers. Ernesto drove 7 kilometers more than one-third of Renaldo's distance. How many kilometers did the 2 men drive in total?
Answer: Renaldo = 15 km. Ernesto = (1 / 3) * 15 + 7 = 12 km. Total = 15 + 12 = 27 km. Renaldo and Ernesto drove a total of 27 kilometers. The answer is 27.
[Question]It takes Nissa 10 seconds to clip each of her cats' nails. 90 seconds to clean each of her ears, and 5 minutes to shampoo her. If the cat has four claws on each foot, how many seconds does grooming her cat take total?
[Answer]First find the total number of claws the cat has: 4 claws / foot * 4 feet = 16 claws. Then find the total time Nissa spends cutting the claws: 16 claws * 10 seconds / claw = 160 seconds. Then find the total time she spends cleaning the cats' ears: 90 seconds / ear * 2 ears = 180 seconds. Then find how long the shampooing takes in seconds: 5 minutes * 60 seconds / minute = 300 seconds. Then add the time she spends on each task to find the total time she spends grooming the cat: 160 seconds + 180 seconds + 300 seconds = 640 seconds. The answer is 640.
[Question]Oliver had $9, then he saved $5 from his allowance and spent $4 on a frisbee and $3 on a puzzle. His friend gives him another $8 as it's his birthday. How much money does Oliver have left?
[Answer]

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
The total amount of money saved is $9 + $5 = $14. The total cost of the frisbee and the puzzle is $4 + $3 = $7. So Oliver has $14 - $7 = $7 left. His friend gives him $8, so now he has $7 + $8 = $15. The answer is 15.