[Question]Sasha heard that planting trees helps to reduce the local temperature. For each tree planted, the temperature drops .1 degree. A tree costs $6 to plant. If she got the local temperature to drop from 80 to 78.2, how much did it cost to plant the trees?
[Answer]The temperature dropped 1.8 degrees because 80 - 78.2 = 1.8. She planted 18 trees because 1.8 / .1 = 18. It cost $108 to plant the trees because 18 x 6 = 108. The answer is 108.
Q: Natalie bought some food for a party she is organizing. She bought two cheesecakes, an apple pie, and a six-pack of muffins. The six-pack of muffins was two times more expensive than the cheesecake, and one cheesecake was only 25% cheaper than the apple pie. If the apple pie cost $12, how much did Natalie pay for all her shopping?
A: One cheesecake was 30% cheaper than the apple pie, which means, it was 25 / 100 * 12 = $3 cheaper. So for one cheesecake, Natalie needed to pay 12 - 3 = $9. The six - pack of muffins was two times more expensive than the cheesecake, which means its price was 9 * 2 = $18. So for two cheesecakes, Natalie paid also 9 * 2 = $18. So for all her shopping she paid 18 + 18 + 12 = $48. The answer is 48.
Question: An opera house has 150 rows; each row has ten seats. The ticket costs $10 per show. How much did the opera house earn from one of the shows if 20% of the seats were not taken?
Answer: The opera house has 150 x 10 = 1500 seats. There are 1500 x 20 / 100 = 300 seats that were not taken. The total number of seats taken was 1500 - 300 = 1200. Therefore, the opera house earned $10 x 1200 = $12000 from one of the shows. The answer is 12000.
[Question]Grandma wants to order 5 personalized backpacks for each of her grandchildren's first days of school. The backpacks are 20% off of $20.00 and having their names monogrammed on the back pack will cost $12.00 each. How much will the backpacks cost?
[Answer]She needs 5 backpacks that are $20.00 each so that's 5 * 20 = $100.00. The backpacks are currently 20% off so that's 100 * .20 = $20.00 off. The backpacks costs $100.00 but are $20.00 off so they will cost $100 - $20 = $80.00. She wants each of the 5 backpacks to have her grandchild's name monogramed on them which costs $12.00 each so that's 5 * $12 = $60.00. The backpacks cost $80.00 and the monogramming costs $60.00 so together they will cost $80 + $60 = $140.00. The answer is 140.
Q: Jeff has 16 GB of storage on his phone. He is already using 4 GB. If a song takes up about 30MB of storage, how many songs can Jeff store on his phone? (There are 1000 MB in a GB).
A: Jeff has 16 - 4 = 12GB left over on his phone. Therefore, he has 12 * 1000 = 12,000MB. Therefore, he can store 12,000 / 30 = 400 songs. The answer is 400.
Question: A volcano erupts and spews ash into the sky. The ash cloud spreads out in a diameter eighteen times as far as the distance it shot up into the sky. If the ashes erupted three hundred feet into the sky, what was the radius of the ash cloud in feet?
Answer:
The ash cloud spread out 300 * 18 = 5400 feet in diameter. The radius is half the diameter, so the ash cloud had a radius of 5400 / 2 = 2700 feet. The answer is 2700.