Question 1188061

A 9 inch apple pie sells for $6. What is its cost per square inch (in2) round to the nearest cent?
<pre>Cost of pie: $6
Area of pie: {{{matrix(1,3, pi*r^2, "sq.", inches)}}} 
With radius = {{{matrix(1,2, 9/2, inches)}}}, cost per sq. inch: {{{highlight_green(matrix(1,8, 6/(pi * (9/2)^2), "=", .0943, "=", .09, or, 9, cents))}}}</pre>