Triangle abc has coordinates a(2, -5), b(1, -3), and c(6, 1). if the triangle is rotated 90° counterclockwise about the origin, what are the coordinates of b'?

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