1.

The area of the circle with radius y is w. The difference between the areas of the bigger circle (with radius y) and that of the smaller circle (with radius x) is w . So x/y is equal to

A. <table><tr><td rowspan="2"> <span style=" text-decoration: overline;"></span>1 - </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> w'</center></td></tr><tr><td style="text-align: center;">w</td></tr></table>
B. <table><tr><td rowspan="2"> <span style=" text-decoration: overline;"></span>1 + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> w'</center></td></tr><tr><td style="text-align: center;">w</td></tr></table>
C. <table><tr><td rowspan="2"> <span style=" text-decoration: overline;"></span>1 + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>w</center> </td></tr><tr><td style="text-align: center;">w'</td></tr></table>
D. <table><tr><td rowspan="2"> <span style=" text-decoration: overline;"></span>1 + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>w</center> </td></tr><tr><td style="text-align: center;">w'</td></tr></table>
Answer» B. <table><tr><td rowspan="2"> <span style=" text-decoration: overline;"></span>1 + </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> w'</center></td></tr><tr><td style="text-align: center;">w</td></tr></table>


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