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1. In the news last week a guy from Williston purchased face masks for $0.10 a piece. He tried to sell them to local hospitals for $2.50. Calculate the percent change and describe it.

1. In the news last week a guy from Williston purchased face masks for $0.10 a piece. He tried to sell them to local hospitals for $2.50. Calculate the percent change and describe it.

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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1. In the news last week a guy from Williston purchased face masks for $0.10 a piece. He tried to sell them to local hospitals for $2.50. Calculate the percent change and describe it. 2. In the 2008 recession house values dropped drastically. A house was assessed for $299,00 and then after the recession that same house was assessed for $265,00. Calculate the percent change and describe it. 3. A clothing store says they are having 25% off sale with an additional 25% off any blue stickered garments. They claim you are saving 50%. However, when you buy a new coat originally marked $125 the sale price comes up $70.31. You argue that you are being overcharged. What was your actual percent savings? Explain the retailer's mistake. 4. How much pure alcohol is in 150 liters of a 30% alcohol solution? 5. Alcohol mixture: In a chemistry class, 12 liters of a 12% alcohol solution must be mixed with a 20% solution to get a 14% solution. How many liters of the 20% solution are needed?
Transcribed Image Text:1. In the news last week a guy from Williston purchased face masks for $0.10 a piece. He tried to sell them to local hospitals for $2.50. Calculate the percent change and describe it. 2. In the 2008 recession house values dropped drastically. A house was assessed for $299,00 and then after the recession that same house was assessed for $265,00. Calculate the percent change and describe it. 3. A clothing store says they are having 25% off sale with an additional 25% off any blue stickered garments. They claim you are saving 50%. However, when you buy a new coat originally marked $125 the sale price comes up $70.31. You argue that you are being overcharged. What was your actual percent savings? Explain the retailer's mistake. 4. How much pure alcohol is in 150 liters of a 30% alcohol solution? 5. Alcohol mixture: In a chemistry class, 12 liters of a 12% alcohol solution must be mixed with a 20% solution to get a 14% solution. How many liters of the 20% solution are needed?
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