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If the given radius is 5 inches, then the circumference, C is 2pi r, or 2pi(5 inches) = 10pi inches.  You MUST include pi in your calculation of C.

Answer: The exact circumference of the circle is [tex]10\pi[\tex] in.

Step-by-step explanation:

Since, the circumference of a circle is,

[tex]C=2\pi r[/tex]

Where, r is the radius of the circle,

Here, r = 5 inches,

Hence, the circumference of the circle is,

[tex]C = 2\pi(5) = 10\pi\text{ in}[/tex]

Thus, The exact circumference of the circle is [tex]10\pi[\tex] in.