The sales tax in your city is 8.8%, and an item costs $63 before tax. How much tax would you pay on that item? round to the nearest hundredth or cent

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