Question

find the length of the diameter.

the diameter is mm.

Explanation:

Identify the given radius

$$ r = 7.1\text{ mm} $$

Apply the diameter formula

$$ d = 2r $$

Calculate the diameter

$$ d = 2 \times 7.1 = 14.2\text{ mm} $$

Answer:

Find the length of the diameter.
The diameter is <blank>14.2</blank> mm.