A circular mat with diameter 20 inches is placed on a square tabletop, each of whose sides is 25 inches long. Which of the following is closest to the fraction of the tabletop covered by the mat? Select:  A) 0.5024  B) 2/5  C) 1/2  D) 3/4  E) 5/6
It is a circle inscribed in a square.   Square side=25---&gt; square(table) area=25^2   Circle diameter=20---&gt; Circle area=PiR^2=100Pi (where Pi=~3.14)   covered fraction=100*3.14/25*25= 
<gadget id="calculator">100*3.14/25*25</gadget>
<output>314</output>
~314/25*25=0.5024   0.5024
<result>A</result>
A circular mat with diameter 20 inches is placed on a square tabletop, each of whose sides is 25 inches long. Which of the following is closest to the fraction of the tabletop covered by the mat?