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

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