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Mathematics 15 Online
OpenStudy (igreen):

A giant pie is created in an attempt to break a world record for baking. The pie is shown below: What is the area of the slice of pie that was cut, rounded to the nearest hundredth?

OpenStudy (igreen):

OpenStudy (igreen):

Okay, so first I find the area, which I got as 225π. Now the slice is a portion of a total 360 degrees..which I can write as \(\sf \dfrac{48}{360}\). Now I multiply that to 225π: \(\sf 225 \pi \times \dfrac{48}{360} \rightarrow 706.858347 \times 0.133333333 \approx 94.25\)

OpenStudy (igreen):

Correct..?

hartnn (hartnn):

absolutely correct :)

hartnn (hartnn):

ou're essentially finding area of sector

hartnn (hartnn):

*you're

OpenStudy (igreen):

Hmm..but that doesn't seem to be one of my options..the closest one is 91.98..

hartnn (hartnn):

Area of sector : \(\Large \dfrac{\theta }{360}\pi r^2 \)

hartnn (hartnn):

theta = 42 r =15

OpenStudy (anonymous):

What are the choices?

hartnn (hartnn):

you still get 94 with that ? if so its correct

OpenStudy (igreen):

78.13 ft2 82.43 ft2 86.31 ft2 91.98 ft2

OpenStudy (anonymous):

Wait a sec, it's 42 bloody degrees haha

hartnn (hartnn):

you used 48 instead of 42 thats why!

OpenStudy (igreen):

LOL I'm so stupid..

OpenStudy (igreen):

Now I get 82.47..

OpenStudy (igreen):

Which is closest to 82.43..I'm going with that.. lol

hartnn (hartnn):

good! :)

OpenStudy (anonymous):

Good work.

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