Question 105859
A=pi*r^2 r=4.5
pi*4.5^2= 20.25*pi
.
pi*6.5^2= 42.25*pi
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now we set up a proportion to see what the fai price will be. The pi's cancel out, so we wont put them in.
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{{{42.25/20.25=x/8}}}
{{{42.25*8/20.25=x}}}
x=$16.69 Fair price
Ed