The equation of a circle is x2+y2+8x−14y+56=0 .

what is the radius of the circle?

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r = units

What is the value of the digit 1 in the number 13?

For what value of (y) is 3^3/3^y =1/9

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32