Find the requested area.Find the area of a circle with a radius of 10 cm. Use  for ?.

A. 31 cm2  
B. 62 cm2  
C. 314 cm2  
D. 1257 cm2  


Answer: C

Mathematics

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Use the given information to find the exact value of the expression.cos ? = , ? lies in quadrant IVFind sin 2?.

A.
B.
C. - 
D. - 

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B. ?
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