Q: Doris earns $20 per hour by babysitting. She needs to earn at least $1200 for her monthly expenses. She can babysit for 3 hours every weekday and 5 hours on a Saturday. How many weeks does it take for Doris to earn enough to cover her monthly expenses?
A: Doris babysits for a total of 5 weekdays x 3 hours / weekday = 15 hours. She babysits for a total of 15 + 5 = 20 hours in a week. She earns 24 x $20 = $480 in a week. So, it will take $1440 / $480 = 3 weeks to earn Doris needed amount. The answer is 3.
Question: Jack and Jill are friends who borrow from each other often. Last week Jack borrowed $1200 from Jill, which he promised to pay back with an interest of 10%. How much will Jack pay back?
Answer: The interest on the loan is 0.1 * 1200 = $120. The total amount Jack needs to pay back is 1200 + 120 = 1320. The answer is 1320.
[Question]Hannah ran 9 kilometers on Monday. She ran 4816 meters on Wednesday and 2095 meters on Friday. How many meters farther did she run on Monday than Wednesday and Friday combined?
[Answer]Wednesday + Friday = 4816 + 2095 = 6911 meters. 9 km = 9000 meters. 9000 - 6911 = 2089 meters. Hannah ran 2089 meters farther on Monday than Wednesday and Friday. The answer is 2089.
Q: Mirasol had $50 in her account. She spent $10 on coffee beans and $30 on a tumbler. How much is left in her account?
A: Mirasol spent a total of $30 + $10 = $40. Thus, Mirasol has $50 - $40 = $10 left in her account. The answer is 10.
Question: Micheal decided to take some piano lessons. One lesson costs $30 and lasts for 1.5 hours. How much will Micheal need to pay for 18 hours of lessons?
Answer: One lesson lasts 1.5 hours, so 18 hours of them is 18 / 1.5 = 12 lessons. If one lesson costs $30, then 12 lessons cost 12 * 30 = $360. The answer is 360.
Q: John is trying to save money by buying cheap calorie-dense food. He can buy 10 burritos for $6 that have 120 calories each. He could also buy 5 burgers that are 400 calories each for $8. How many more calories per dollar does he get from the burgers?
A:
The burritos have 10 * 120 = 1200 calories. That means he gets 1200 / 6 = 200 calories per dollar. The burgers get 5 * 400 = 2000 calories. So he gets 2000 / 8 = 250 calories per dollar. So he gets 250 - 200 = 50 more calories per dollar from the burgers. The answer is 50.