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OpenStudy (anonymous):
What is the exact area of a circle with a diameter of 13 inches?
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OpenStudy (saifoo.khan):
pi r^2 pi x 13x13
OpenStudy (saifoo.khan):
530.929
OpenStudy (anonymous):
i have multiple choice
OpenStudy (anonymous):
thats incorrect
OpenStudy (saifoo.khan):
oh SHOOOOOOT!
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OpenStudy (anonymous):
6.5π square inches 13π square inches 26π square inches 42.25π square inches 169π square inches its one of these
OpenStudy (anonymous):
so 13 pi
OpenStudy (saifoo.khan):
169/4 pi
OpenStudy (anonymous):
?
OpenStudy (saifoo.khan):
u gave the diameter. in formulae v insert the radius! :O
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OpenStudy (anonymous):
yes so 169 is it
OpenStudy (saifoo.khan):
169/4
OpenStudy (anonymous):
42.25
OpenStudy (saifoo.khan):
169/4 pi
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