[Question]Mark wants to tip his server 20% on a $200 check. If his friend agrees to kick in $10, how much should Mark add?
[Answer]First find the total tip amount: 20% * $200 = $40. Then subtract the friend's contribution: $40 - $10 = $30. The answer is 30.
Q: Milly's babysitter charges $16/hour. Milly is considering switching to a new babysitter who charges $12/hour, but also charges an extra $3 for each time the kids scream at her. If Milly usually hires the babysitter for 6 hours, and her kids usually scream twice per babysitting gig, how much less will the new babysitter cost?
A: First figure out how much the first babysitter costs by multiplying her hourly rate by the number of hours she works: $16 / hour * 6 hours = $96. Then use the same method to figure out how much the second babysitter charges before any screaming: $12 / hour * 6 hours = $72. Then figure out how much the babysitter charges for two screams: 2 screams * $3 / scream = $6. Finally, subtract the second babysitter's two charges from the first babysitter's total charge to find the difference: $96 - $72 - $6 = $18. The answer is 18.
Question: When Patrick, Manu, and Amy participate in a race they realize that Patrick finishes the race in 60 seconds. Manu took 12 more seconds to finish the race. If Amy is twice as fast as Manu, how long did it take her to finish the race?
Answer: The time it took Manu to complete the race is 60 + 12 = 72 seconds. If Amy is twice as fast as Manu, then she takes half the time Manu did to finish the race, so Amy took 1 / 2 * 72 = 36 seconds. The answer is 36.
[Question]Wade has a hot dog food truck. He makes $2.00 in tips per customer. On Friday he served 28 customers. He served three times that amount of customers on Saturday. On Sunday, he served 36 customers. How many dollars did he make in tips between the 3 days?
[Answer]On Saturday, he served 3 times the amount of customers that he served on Friday, which was 28 customers so he served 3 * 28 = 84 customers. He served 28 customers on Friday, 84 on Saturday and 36 customers on Sunday for a total of 28 + 84 + 36 = 148 customers. Each customer tipped him $2.00 and he had 148 customers so he made 2 * 148 = $296.00. The answer is 296.
Q: Ross takes 17 breaths per minute by inhaling 5/9 liter of air to his lungs. What is the volume of air inhaled in 24 hours?
A: We have 60 minutes per hour. So, in 24 hours we have 60 * 24 = 1440 minutes. So, the volume of air Ross inhaled in 24 hours is: 17 breaths / minute * 5 / 9 L / breath * 1440 minutes = 122400 / 9 = 13600 liters. The volume of air inhaled is 13600 liters. The answer is 13600.
Question: John buys thank you cards. He decides to buy them for people who got him Christmas and birthday presents. He sent 20 for Christmas gifts and 15 for birthday gifts. If each card cost $2 how much did he spend on cards?
Answer:
He bought 20 + 15 = 35 cards. So he spent 35 * 2 = $70. The answer is 70.