Answer:
<h2>Yes the circumference is about times greater than their diameters</h2>
Step-by-step explanation:
We will approach this problem by doing a check
Say the diameter of a circle is 4 cm
Hence the radius is 3 cm
We know that the circumference is 

The circumference is about 3 time bigger than the diameter
Let us try another case say the diameter is 6 cm
The radius is 3 cm

$33.33
20/9 = $2.22 per sheet
$2.22*15 = $33.33
2.
you had nothing for 1. and I am not sure what you mean by 4.
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