A fish starts swimming at -50m and increases 13m. Which equation best represents the situation and the fish's final elevation? at A) -50 + 13 = -63 B) -50+ (-13) = -63 C-50 + 13 = -37 D) -50 - 13 = -37​

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