Question: Laura’s House is a 20-mile round trip from her school. The supermarket is 10 miles farther away from the school. If Laura drives to school every morning and two afternoons a week drives to the supermarket. How many miles does Laura driver per week?
Answer: 7 days a week Laura drives 20 miles to school, so Laura drives 7 x 20 = 140 miles to school in one week. The supermarket is 10 miles farther away than the school. Therefore the supermarket is 10 + 10 = 20 miles away from Laura’s house. Laura drives 20 miles each way to and from the supermarket. Each trip is 20 x 2 = 40 miles. Laura drives 40 miles twice a week to visit the supermarket. Therefore she drives 40 x 2 = 80 miles in total a week to and from the supermarket. In total Laura drives 140 + 80 = 220 miles each week. The answer is 220.

Question: In the fall, 20,000 high school students apply to Harvard University for college. In the spring, 5% of those 20,000 students are accepted to the university. Of the students who are accepted, 90% choose to attend the university, and the other 10% choose to go to other schools. How many students choose to attend Harvard University?
Answer: The number of students accepted to the university is 20,000 * 0.05 = 1,000 students. The number of students who choose to attend the university is 1,000 * 0.9 = 900 students. The answer is 900.

Question: Thomas has 25 drawings to display. 14 of the drawings were made using colored pencils. 7 of the drawings were made using blending markers. The rest of the drawings were made with charcoal. How many are charcoal drawings?
Answer: Thomas made 14 + 7 = 21 colored pencil and blending marker drawings. Thomas made 25 total drawings – 21 colored pencil and blending marker drawings = 4 charcoal drawings. The answer is 4.

Question: Wayne wants to serve shrimp cocktail as an appetizer. He plans on 5 shrimp per guest and will have 40 guests. If the shrimp costs $17.00 per pound and each pound has 20 shrimp, how much will he spend on the appetizer?
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.
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He wants to serve 5 shrimp per guest and will have 40 guests so he needs 5 * 40 = 200 shrimp. Each pound of shrimp has 20 shrimp and he needs 200 shrimp so he needs 200 / 20 = 10 pounds of shrimp. The shrimp is $17.00 per pound and he needs 10 pounds so he will spend 17 * 10 = $170.00 on shrimp. The answer is 170.