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Ainat [17]
3 years ago
5

C=2(3.14)r; c=14(3.14) solve for r

Mathematics
1 answer:
tekilochka [14]3 years ago
7 0

Answer:

c=2(3.14)r

given c=14(3.14), then r

make r the subject formula and substitute given c=14(3.14)

r=c/2(3.14)

r=14(3.14)/2(3.14)

r=7

Step-by-step explanation:

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A student bought 34 pencils for school.if he sharpened 16 of the pencils before school whats is his ratio of unsharpened pencils
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3 years ago
Plz help<br><br> Simplify 6(x + 4)
saw5 [17]

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Steps/Reasons:

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8 0
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Read 2 more answers
[calculus] the distance from the point (6, -4) to the circle <img src="https://tex.z-dn.net/?f=x%5E2%2By%5E2-8y%3D0" id="TexForm
stealth61 [152]

Answer:

Option C.

The distance from the point to the circle is 6 units

Step-by-step explanation:

we know that

The distance between the circle and the point will be the difference of the distance of the point from the center of circle  and the radius of the circle

step 1

Find the center and radius of the circle

we have

x^{2} +y^{2}-8y=0

Convert to radius center form

Complete the square

x^{2} +(y^{2}-8y+16)=0+16

Rewrite as perfect squares

x^{2} +(y-4)^{2}=16

so

The center is the point (0,4)

The radius is

r^{2}=16\\r=4\ units

step 2

Find the distance of the point from the center of circle

the formula to calculate the distance between two points is equal to

d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}

we have

(6,-4) and (0,4)

substitute the values

d=\sqrt{(4+4)^{2}+(0-6)^{2}}

d=\sqrt{(8)^{2}+(-6)^{2}}

d=\sqrt{100}\ units

d=10\ units

step 3

Find the difference of the distance of the point from the center of circle  and the radius of the circle

10\ units-4\ units=6\ units

therefore

The distance from the point to the circle is 6 units

see the attached figure to better understand the problem

3 0
3 years ago
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