Parameterize <em>C</em> by
r(t) = 〈x(t), y(t)〉 = 〈cos(t), sin(t)〉
with 0 ≤ t ≤ <em>π</em>. Then the line integral is

<span>He can choose his sample from every third person on each list rather than 10 people.</span>
C= $60.00+$0.05d is the linear equation, if you have any questions feel free to ask. (:
Because when you multiply the 9 by x you get 9x and when you multiply the 9 by 3 you get 27. So then your final answer would be 9x + 27.
I hope this helps!! :)