Answer:
Below
Explanation:
radius = 4.5 diameter = 2 x 4.5 in
the circumference of a circle is given by the formula p * d
substitute in the underlined equation for 'diameter')
circumference = 2 * 4.5 * pi inches
C = 2 x 4.5 x π
The equation to find the circumference of the circle is
C = 2π · r
r = 4.5 in
Looking at the options, the answer is C = 2 x 4.5 x π
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