If 14 out of 20 is correct what percent is that?
2 answers:
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Can or bottle? A can will be the calculation for the surface area of a cylinder which is A= 
if r is the radius of the circle on the top and bottom of the can and h is the height of the can. A can is basically two circles and a big rectangle. For a bottle I don't know there are too many components and no numbers to solve for that