Write the standard equation of a circle with center (0,0) and radius 7

x^2 + y^2 = 49

Step-by-step explanation:

For center (h,k) and radius r, eqution of the respective circle is

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

x² + y² = 49

Step-by-step explanation:

(x - 0)² + (y - 0)² = 7²

x² + y² = 49

the answer is a

step-by-step explanation:

because if you put 1 in to the square root of x it equals 300.