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" Given that the area of a circle varies as the square of its radius... "
Complete School Algebra - Page 472
by Herbert Edwin Hawkes, William Arthur Luby, Frank Charles Touton - 1919 - 507 pages
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Elementary Algebra with a Table of Logarithms

Julius Lederer Neufeld - Algebra - 1920 - 424 pages
...equivalent to the sum of two triangles whose bases are 10 and 6, and altitudes 3 and 9 respectively? 10. If the area of a circle varies as the square of its radius, find the radius of a circle equivalent to the sum of two circles whose radii are 5 and 12 respectively....
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Exercise Book in Algebra: A Revision of McCurdy's Exercise Book in Algebra

Oswald Tower - Algebra - 1922 - 196 pages
...10 feet is 314.159 square feet. Find the area of a circle whose radius is 12 feet, from the law that the area of a circle varies as the square of its radius. 17. From the same law show that the area of a circle 2\ inches in diameter is equal to the sum of the...
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Junior High School Mathematics Book 1-3 [and] 1 Book Course, Book 2

Theodore Lindquist - Mathematics - 1920 - 254 pages
...(3) indicates that the area of a circle is proportional to the square of its radius. Or we say that the area of a circle varies as the square of its radius. Note that, when two quantities are proportional or when one quantity varies as the other, one quantity...
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Advanced Algebra

Edward Ira Edgerton, Perry Amherst Carpenter - Algebra - 1925 - 400 pages
...• • as a geometric progression and then find its value. 22. Prove that (1 - i)z = -~ 1 + i 23. The area of a circle varies as the square of its radius. When the radius is 6 feet the area is 113.0976 square feet. What 1s the area when the radius is 8 feet?...
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Oxygen Consumption During Emotional Stimulation

Edith Totten - Emotions - 1925 - 88 pages
...time without causing an expansion of the chest seems possible. As Pearce and Hoover point out (11), the area of a circle varies as the square of its radius, and a slight increase, therefore, in the diameter of the bronchi and bronchioles would cause a relatively...
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Algebra

William Raymond Longley, Harry Brooks Marsh - Algebra - 1926 - 608 pages
...occur in the formulas of mensuration. Thus if A is the area of a circle of radius r, then A = irr2. The area of a circle varies as the square of its radius. If V is the volume of a sphere of radius r, then V = t тгг3. The volume of a sphere varies as the...
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Comparative Psychology Monographs

Edith Totten, Franklin Cressey Paschal, Louis Robert Sullivan - Ability - 1926 - 368 pages
...time without causing an expansion of the chest seems possible. As Pearce and Hoover point out (11), the area of a circle varies as the square of its radius, and a slight increase, therefore, in the diameter of the bronchi and bronchioles would cause a relatively...
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Industry and Trade: A Study of Industrial Technique and Business Organization

Alfred Marshall - Business - 1927 - 908 pages
...till the returns are brought home: and this cost increases, though irregularly, with the distance. But the area of a circle varies as the square of its radius. Therefore improvements in the mechanism or the organization of transport, which increase the distance...
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Industry and Trade, Volume 1

Alfred Marshall - Business & Economics - 2006 - 424 pages
...till the returns are brought home: and this cost increases, though irregularly, with the distance. But the area of a circle varies as the square of its radius. Therefore improvements in the mechanism or the organization of transport, which increase the distance...
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