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galben [10]
3 years ago
14

A building at Elmira College has a room shaped like an octagon. The length of each side of the room is 35 feet. What is the peri

meter of this room ?
Mathematics
1 answer:
Softa [21]3 years ago
5 0
Since an <em>octagon</em> has 8 equal sides, multiply the given 35ft length by 8 to get total perimeter.

35 * 8 = 280 ft
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In 2010, the population of Kingsford was 8000. By 2014 the population had increased by 15% and 2/5 of the population was age 12
Anastasy [175]
<h2>Hello!</h2>

The answer is: The population age 12 or under was 3680.

<h2>Why?</h2>

If in 2010 the population of Kignsford was 8000, and by 2014 the population had increased by 15% we need to calculate the total population and then, calculate how many people was age 12 or under.

We must remember that we cannot work with percentage values, so, to make 15% a real number, we need to divide it by 100:

15(Percentage)=\frac{15}{100}=0.15

So,

Calculating the population by 2014, we have:

Population_{2014}=Population_{2010}+ Population_{2010}*0.15

Then, substituting we have:

Population_{2014}=8000+ 8000*0.15=9200

Now, calculating the population that was age 12 or under, knowing that it was 2/5 of the total population, we have:

Population=TotalPopulation*\frac{2}{5}\\\\Population=9200*\frac{2}{5}=3680

So, the population age 12 or under was 3680.

Have a nice day!

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Need help asap!! Thank u
fiasKO [112]

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Answer:

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Step-by-step explanation:

using FOIL:

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he has 9 quarters and 12 nickles.

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