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January 31, 2015

January 31, 2015

Posted by **syram** on Thursday, March 7, 2013 at 6:11pm.

- math -
**PsyDAG**, Friday, March 8, 2013 at 1:24pmIt would help if you proofread your questions before you posted them.

I assume that all of your "placements" are really placemats.

Area = π * r^2

d = 2r

Area of coaster = π * 3.5^2

Area of placemat = π * 7^2

Subtract area of coaster from area of placemat.

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