What is the Best estimate for 74÷634

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

Which of these choices show a pair of equivalent expressions?

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