Which equation represents the general form a circle with a center at (–2, –3) and a diameter of 8 units? x2 + y2 + 4x + 6y – 51 = 0 x² + y² – 4x – 6y – 51 = 0 x2 + y2 + 4x + 6y – 3 = 0 x2 + y2 – 4x – 6y – 3 = 0

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio