Question

Pls help!! For 50 points:

write standard form of the equation of the circle with center(0,0) and radius 3 .

Answer 1

Answer: D x² + y² = 9

Explanation:

Standard form of a circle formula:

(x-h)² + (y-k)² = r²

where (h,k) is the center and r is the radius

(0,0) = (h, k)

r= 3

substitute:

(x-0)² + (y-0)² = 3² >square the 3 and x-0 = x

x² + y² = 9 >A could be answer substituted but not simplified

D is your answer