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Mathematics
Mathematics
Problem
Let C be the right half of the circle
x
2
+
y
2
=
9
x^{2}+y^{2}=9
x
2
+
y
2
=
9
. What is the area of the region enclosed by C and the
y
y
y
-axis? a)
9
π
9\pi
9
π
b)
9
π
4
\dfrac{9\pi}{4}
4
9
π
c)
9
π
2
\dfrac{9\pi}{2}
2
9
π
d)
3
π
3\pi
3
π
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