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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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Exercises in Algebra

Edward Rutledge Robbins, Frederick Howland Somerville - Algebra - 1904 - 188 pages
...varies inversely as (2 x + 1) (ж — 3) and у = — when ж = 2, find ж when у = 1-J. 16. If the area of a circle varies as the square of its radius, and the area of a circle whose radius is 7 is 154, find the area of the circle whose radius is 10....
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Essentials of Algebra: Complete Course (an Adequate Preparation for the ...

John Charles Stone, James Franklin Millis - Algebra - 1905 - 792 pages
...is 18 sq. inches. WThat will be the area when the base is 6 inches and the altitude 10 inches ? 11. The area of a circle varies as the square of its radius. When the radius is С feet the area is 113.0976 square feet. What is the area when the radius is 8...
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Advanced Algebra

Arthur Schultze - Algebra - 1905 - 694 pages
...when у = 2, 2 = 4. 16. If гсэс^, and a; =2, when у = 12, 2 = 2; und x when г/ = 7, 2 = 3. 17. The area of a circle varies as the square of its radius. If the area of a circle is 100 square yards, when the radius is a feet, find the area of a circle whose...
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Advanced Algebra

Arthur Schultze - Algebra - 1906 - 582 pages
...when у = 2, z = 4. 16. If x ж y-, and x = 2, when у = 12, z = 2 ; find ж when у = 7, z = 3. z 17. The area of a circle varies as the square of its radius. If the area of a circle is 100 square yards, when the radius is a feet, find the area of a circle whose...
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Elementary Algebra

Jacob William Albert Young, Lambert Lincoln Jackson - Algebra - 1908 - 462 pages
...the base is 8 and the altitude 3, what is the area of a triangle whose base is 40 and altitude 20? 7. The area of a circle varies as the square of its radius. The area of a circle of radius 2 is 12.5664; what is the area of a circle whose radius is 5.5? 8. The volume of a...
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School Algebra

James William Nicholson - Algebra - 1909 - 332 pages
...the former is | when the latter is |, what will the latter be when the former is 9 ? 10. Given that the area of a circle varies as the square of its radius, prove that the area of a circle whose radius is 5 in. is equal to the sum of the areas of two circles...
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College Algebra

Henry Lewis Reitz - 1909 - 296 pages
...k is called the constant of variation. The expression " y varies as x " is often written y ос x. The area of a circle varies as the square of its radius. That is, A oc Ia, or A = kr3, if A represent the area and r the radius. Here, k, the constant of variation,...
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First Course in Algebra

Herbert Edwin Hawkes, Frank Charles Touton, William Arthur Luby - Algebra - 1910 - 368 pages
...it weigh (a) 1000 miles above the surface ? () 2000 miles above the surface ? (e) 4000 miles ? 20. The area of a circle varies as the square of its radius....inches. Find the radius of a circle whose area is 594 square inches. 21. The weight of a sphere of given material varies directly as the cube of its...
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A Second Course in Elementary Algebra

Jacob William Albert Young, Lambert Lincoln Jackson - Algebra - 1910 - 232 pages
...the base is 8 and the altitude 3, what is the area of a triangle whose base is 40 and altitude 20 ? 7. The area of a circle varies as the square of its radius. The area of a circle of radius 2 is 12.5664; what is the area of a circle whose radius is 5.5 ? 8. The volume of...
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Second Course in Algebra

Herbert Edwin Hawkes - Algebra - 1911 - 288 pages
...it weigh (f) 1000 miles above the surface ? () 2000 mues above the surface ? (c) 4000 miles ? 20. The area of a circle varies as the square of its radius....inches. Find the radius of a circle whose area is 594 square inches. 21. The weight of a sphere of given material varies directly as the cube of its...
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