Question 198670
<font face="Tahoma" size=1.5>
</pre><font size=4><b>
*Note: {{{A[C]=(pi)r^2}}}


So, "Half" of this is a semi-circle, {{{(1/2)(pi)r^2}}}


With r = 12 inches,
={{{(1/2)(pi)12^2=(1/2)(pi)144}}}
={{{red(72(pi)in^2)}}}


Then,  {{{(Cost/Area)(Area)}}}
={{{(0.75/cross(in^2))(72(pi)cross(in^2))}}}
={{{54(pi)}}} ---> <font color=blue>$169.65</font>, Answer


Thank you,
Jojo</font>