Find the diameter of a circle whose equation is

x^2 + (y - 2) ^2=100

A) 100

B) 400

C) 10

D) 20

D) 20

Step-by-step explanation:

x^2 + (y - 2) ^2=100

This can be rewritten as

(x-0) ^2 + (y - 2) ^2=10^2

This is in the form

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

The radius is 10

The diameter is 2 times the radius

d = 2*r = 2*10 = 20