Skate Land charges a $50 flat fee for birthday party rental and $5.50 for each person. Joann has no more than $100 to spend on t
2 answers:
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I assume each path is oriented positively/counterclockwise.
(a) Parameterize by
with . Then the line element is
and the integral reduces to
The integrand is symmetric about , so
Substitute and
. Then we get
(b) Parameterize by
with . Then
and
Integrate by parts with
(c) Parameterize by
with . Then
and
