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mote1985 [20]
3 years ago
13

Find the area of a circle with radius, r = 8cm. Give your answer in terms of π .

Mathematics
2 answers:
olchik [2.2K]3 years ago
8 0

Answer:

<h2>64π</h2>

Step-by-step explanation:

<h3>to understand this </h3><h3>you need to know about</h3>
  • circle
  • algebra
  • area of circle=πr²

where r means redious

so

given

r=8cm

using the formula πr²

the area of the circle Is

π×8² cm² (as redious =8)

π×64

therefore

64π (in terms of π)

Leto [7]3 years ago
7 0

Answer:

64π

Step-by-step explanation:

to find the area of a circle use the following formula

πr²

That means we have π8²

which will simplify into 64π

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A scientist measured the width of a square flake of gold to be7.3 x 10 -4mm what is the area of the flake
irakobra [83]

The area of square flake of gold is 53.29 \times 10^{-8} \mathrm{mm}

<h3><u>Solution:</u></h3>

Given that width of square flake of gold is 7.3 \times 10^{-4} millimeter

To find : Area of square flake

Since gold flake is in shape of square, we can use area of square formula

<em><u>The formula for area of square is given as:</u></em>

area = s^2

where "s" is the length of one side

\begin{array}{l}{\text { Area of a square flake }=\left(7.3 \times 10^{-4}\right) \times\left(7.3 \times 10^{-4}\right)} \\\\ {\text { Area of a square flake }=53.29 \times 10^{8}}\end{array}

Hence , the calculated area of flake is 53.29 \times 10^{-8} \mathrm{mm}

7 0
2 years ago
563-273 do you have to regroup
Marizza181 [45]
Yes you do because you cannot subtract 7 from 6.
8 0
3 years ago
A community center is expanding the size
Katen [24]

So the original area is 300*150 (or 45000 ft^2), but now the new area is (300+3y)(150+3y).

The polynomial in standard form would be 45000+900y+450y+9y^2=45000+1350y+9y^2

But the proper way to write it is 9y^2+1350y+45000

When y=4, we get 9(4^2)+1350(4)+45000=9(16)+54000+45000=144+99000=99144

So the new area would be 99144 ft^2

Hope this helped!

6 0
3 years ago
Can someone help me with this problem?
anzhelika [568]
30(2+1) is the answer
7 0
2 years ago
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$1,200 is deposited into an account with 4.5% simple interest. How much would it earn in interest after 3 years?
zalisa [80]

Answer:

$162

Step-by-step explanation:

$1200 x .045 = $54 x 3 years = $162

8 0
2 years ago
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