Question: Jen and Tyler are gymnasts practicing flips. Jen is practicing the triple-flip while Tyler is practicing the double-flip. Jen did sixteen triple-flips during practice. Tyler flipped in the air half the number of times Jen did. How many double-flips did Tyler do?
Answer: Jen did 16 triple - flips, so she did 16 * 3 = 48 flips. Tyler did half the number of flips, so he did 48 / 2 = 24 flips. A double flip has two flips, so Tyler did 24 / 2 = 12 double - flips. The answer is 12.
[Question]While on vacation in New York, Greg went out for a lunch that cost $100. If sales tax in New York is 4% and he left a 6% tip, how much did Greg pay?
[Answer]The sales tax is worth $100 x 4 / 100 = $4. Greg left $100 x 6 / 100 = $6 tip. So, the total cost for the tax and the tip is $4 + $6 = $10. Therefore, Greg paid $100 + $10 = $110 in all. The answer is 110.
Q: Bob drove for one and a half hours at 60/mph. He then hit construction and drove for 2 hours at 45/mph. How many miles did Bob travel in those 3 and a half hours?
A: Bob drove for 1.5 hour * 60 / mph = 90 miles. Bod drove for 2 hour * 45 / mph = 90 miles. In total Bob drove 90 + 90 miles = 180 miles. The answer is 180.
Question: When Matty was born, the cost of a ticket to Mars was $1,000,000. The cost is halved every 10 years. How much will a ticket cost when Matty is 30?
Answer: First find the total number of times the cost is halved: 30 years / 10 years / halving = 3 halvings. Then halve the cost once: $1,000,000 / 2 = $500,000. Then halve the cost a second time: $500,000 / 2 = $250,000. Then halve the cost a third time: $250,000 / 2 = $125,000. The answer is 125000.
[Question]Dakota gets hit by a bus and has to spend 3 days in the hospital. The hospital charges her $900/day for her bed, $250/hour for two specialists to look at her 15 minutes each, and $1800 for the ambulance ride. How much is Dakota's medical bill?
[Answer]First find the total cost of the hospital bed by multiplying the cost per day by the number of days: $900 / day * 3 days = $2700. Then figure out how many minutes total the two specialists looked at Dakota: 15 minutes / specialist * 2 specialists = 30 minutes. Then divide the number of minutes by the number of minutes per hour and multiply it by the specialists' hourly rate to find their total charge: 30 minutes / 60 minutes / hour * $250 / hour = $125. Finally, add up the cost of the specialists, ambulance and bed to find Dakota's total bill: $2700 + $1800 + $125 = $4625. The answer is 4625.
[Question]Jefferson hires a carriage to go to the church. It is 20 miles away. The horse can go 10 miles per hour. It cost $30 per hour plus a flat fee of $20. How much did he pay for the carriage?
[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
He paid for 20 / 10 = 2 hours. That means the hourly fee was 30 * 2 = $60. So the total cost was 60 + 20 = $80. The answer is 80.