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tangare [24]
3 years ago
7

How do you calculate the area of a circle with the diameter? what's the formula?

Mathematics
1 answer:
alexdok [17]3 years ago
3 0
Area of a circle is pi times the radius squared.

If you know the diameter, just divide it by 2 to get the radius.
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A Square was altered so that one side is increased by 9 inches in the other side is decreased by 2 inches.The area of the result
LekaFEV [45]

Let s represent the length of any one side of the original square.  The longer side of the resulting rectangle is s + 9 and the shorter side s - 2.

The area of this rectangle is (s+9)(s-2) = 60 in^2.

This is a quadratic equation and can be solved using various methods.  Let's rewrite this equation in standard form:  s^2 + 7s - 18 = 60, or:

s^2 + 7s - 78 = 0.  This factors as follows:  (s+13)(s-6)=0, so that s = -13 and s= 6.  Discard s = -13, since the side length cannot be negative.  Then s = 6, and the area of the original square was 36 in^2.

4 0
3 years ago
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LuckyWell [14K]
They have 1.4 bags of popcorn.

1) 9 7/8

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3) 58
8 0
3 years ago
I don't know how do do it can u help me ​
Blizzard [7]

Answer:

The second regon

Step-by-step explanation:

4 0
3 years ago
Is the answer B correct?
VashaNatasha [74]
If you do the elimination process, here it is.

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7 0
3 years ago
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Find the area for 5 and 7
hammer [34]

Answer and Step-by-step explanation:

The area of a circle:

A = \pi r^{2}

d = 2r

Plug in the values.

5.

A = \pi 7^{2}

A = 49\pi

7.

58 = 2r

r = 29

A = \pi 29^{2}

A = 841\pi

#teamtrees #PAW (Plant And Water)

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