[Question]Ms. Hatcher teaches 20 third-graders and a number of fourth-graders that is twice the number of third-graders. Her co-teacher asked her to substitute for her fifth-grade class that has half as many students as the number of third-graders. How many students did Ms. Hatcher teach for the day?
[Answer]Ms. Hatcher taught 20 x 2 = 40 fourth graders for the day. She taught 20 / 2 = 10 fifth - graders as a substitute teacher for the day. Therefore, she taught 20 + 40 + 10 = 70 students for the day. The answer is 70.
Q: A church has 100 members who've volunteered to bake cookies for the homeless in their local town. If each member baked 10 sheets of cookies, and each sheet has 16 cookies, calculate the total number of cookies the church members baked?
A: A sheet has 16 cookies, so if each church member baked 10 sheets, they each baked 10 sheets / person * 16 cookies / sheet = 160 cookies / person. The total number of church members who decided to volunteer is 100, so in total, they baked 160 cookies / person * 100 people = 16000 cookies. The answer is 16000.
Question: Barry and his friend, Jim, went horseback riding across central Texas. They traveled at 5 miles per hour for 7 hours, and then stopped for the evening. The next day, they traveled at 6 miles per hour for 6 hours, and then at half that speed for another three hours, before stopping to rest for the night. On the third and final day, they traveled for 5 hours at 7 miles per hour. In total, how far did they travel, in miles, during their horseback riding trip?
Answer: On the first day, they traveled 5 * 7 = 35 miles. On the first part of the second day, they traveled 6 * 6 = 36 miles. The second part of the second day, at half their morning speed, they traveled (6 / 2) * 3 = 9 miles. On the final day, they traveled 5 * 7 = 35 miles. In total, they traveled 35 + 36 + 9 + 35 = 115 miles. The answer is 115.
[Question]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?
[Answer]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.
Q: A school choir needs robes for each of its 30 singers. Currently, the school has only 12 robes so they decided to buy the rest. If each robe costs $2, how much will the school spend?
A: The school needs to buy 30 - 12 = 18 robes. So the school will spend 18 x $2 = $36. The answer is 36.
Question: Steve has a bank account that earns 10% interest every year. He puts $100 in it, and then 10 each year. How much money is in it after two years?
Answer:
After one year it earns $10 in interest because 100 x .1 = 10. It has $120 in it after a year because 100 + 10 + 10 = 120. In the second year it earns $12 in interest because 120 x .1 = 12. In the second year it has $142 in it because 120 + 12 + 10 = 142. The answer is 142.