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7 January, 19:28

A bicycle is drawn on a grid such that the front tire is represented by the equation (x-16) ^2+y^2=9 what is the tire's diameter?

A. 6

B. 3

C. 9

D. 4

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Answers (1)
  1. 7 January, 21:10
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    The equation of a circle is equal to:

    (x - h) ^2 + (y - k) ^2 = r^ 2

    where r is the radius

    (x-16) ^2 + y^2 = 3^2

    So the radius is equal to 3.

    We are asked to give the diameter.

    Multiply the radius by 2.

    Then the diameter is 3*2 = 6

    The correct answer is letter A. 6
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