The equation of a circle centered at the origin is x^2+y^2=64.what is the radius of the circle?
a.32
b.8
c.4
d.64

Need on this one asap im almost done with this subject

The description below represents function a and the table represents function b: function a the function is 5 more than 3 times x. function b x y −1 2 0 5 1 8 which statement is correct about the slope and y-intercept of the two functions? (1 point) their slopes are equal but y-intercepts are not equal. their slopes are not equal but y-intercepts are equal. both slopes and y intercepts are equal. neither slopes nor y-intercepts are equal.

Need plz been trying to do it for a long time and still haven’t succeeded