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Nina [5.8K]
3 years ago
7

How can you determine the sale price if you are given the regular price and the percent of markdown?

Mathematics
1 answer:
kotegsom [21]3 years ago
8 0
You convert the percentage into a fraction, multiply this by the sale price, then subtract by this number. Example: Price is $20.00 and the markdown is 20%. First make 20% a decimal by dividing by 100 to get 0.2. Multiply 0.2 by 20 to get 4. Now take 4 and subtract it from 20 to get 16. So a markdown of 20% of a $20.00 item is $16.00
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Step-by-step explanation:

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In 2018, the population will grow over 700,000.The population of a city in 2010 was 450,000 and was growing at a rate of 5% per
Firlakuza [10]

Answer:

The year is 2020.

Step-by-step explanation:

Let the number of years passed since 2010 to reach population more than 7000000 be 'x'.

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Final population is, P=700,000

A population growth is an exponential growth and is modeled by the following function:

P=P_0(1+r)^x

Taking log on both sides, we get:

\log(P)=\log(P_0(1+r)^x)\\\log P=\log P_0+x\log (1+r)\\x\log (1+r)=\log P-\log P_0\\x\log(1+r)=\log(\frac{P}{P_0})\\x=\frac{\log(\frac{P}{P_0})}{\log(1+r)}

Plug in all the given values and solve for 'x'.

x=\frac{\log(\frac{700,000}{450,000})}{\log(1+0.05)}\\x=\frac{0.192}{0.021}=9.13\approx 10

So, for x > 9.13, the population is over 700,000. Therefore, from the tenth year after 2010, the population will be over 700,000.

Therefore, the tenth year after 2010 is 2020.

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Step-by-step explanation:

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