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ISBN: 9781337614085

Textbook Problem

A metal circular disk whose area is 143 cm² is used as a knock out (opening) on an electrical service in a factory. Use your calculator value of π to find the length of the radius of the disk to the nearest tenth of a cm.

To determine

To Find:

The length of the radius of circular metal disk.

The area of the circle is 143 cm².

Formula:

The area of a circle is A=πr2.

Calculation:

The calculator value of π is 3.142857.

Then the area of a circle is,

143=3.142857⋅r2

Check out a sample textbook solution.

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MathGeometryElementary Geometry For College Students, 7e7th Edition

Elementary Geometry For College St...

Solutions

Elementary Geometry For College St...

A metal circular disk whose area is 143 cm2 is used as a knock out (opening) on an electrical service in a factory. Use your calculator value of π to find the length of the radius of the disk to the nearest tenth of a cm.

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Geometry Elementary Geometry For College Students, 7e 7th Edition

A metal circular disk whose area is 143 cm² is used as a knock out (opening) on an electrical service in a factory. Use your calculator value of π to find the length of the radius of the disk to the nearest tenth of a cm.