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Ill say, C) Place the compass' point on the other end of the segment.
The paper clip's length, as shown in the picture, is closest to C. 2 inches.
I hope this helps :)
You are trying so solve
<span><span>3^x</span>=8</span>
and since 8 is not an integral power of x you need a calculator.
it is <span><span>ln(8)/</span><span>ln(3)</span></span>
or
<span><span><span>log(8)/</span><span>log(3)</span></span></span>