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Svet_ta [14]
3 years ago
8

A building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18π meters.

Mathematics
1 answer:
Whitepunk [10]3 years ago
8 0

Answer:

A=81\pi\ m^{2}

Step-by-step explanation:

Step 1

Find the radius of the circular cross section

we know that

The circumference is equal to

C=2\pi r

we have

C=18\pi\ m

substitute and solve for r

18\pi=2\pi r

simplify

18=2 r

r=9\ m

Step 2

Find the area of the circular cross section

The area of the circle is equal to

A=\pi r^{2}

we have

r=9\ m

substitute

A=\pi (9)^{2}

A=81\pi\ m^{2}

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Hello, I really struggle with math and I was wondering if you could help me with the following problem please? It will be much a
xz_007 [3.2K]

Answer:

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Step-by-step explanation:

Simplifying

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Move all terms containing x to the left, all other terms to the right.

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5 0
3 years ago
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3 years ago
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2a^2b^3(4a^2+3ab^2-ab)=? 
<span>
is what I presume you actually meant. </span>
<span>
Pull out the common factors of (4a^2+3ab^2-ab) and you will get </span>
<span>
a(4a+3b^2 -b) </span>

Substitute this back into the original equation and you get 
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2a^2b^3[a(4a+3b^2-b)] = </span>
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3 years ago
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