Consider a circle with radius r=6 and a central of 0= 3pi/4.
What is the exact and length of the arc intersected by 0? Note, the exact answer must contain pie and must be reduced to lowest terms.

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