12.0 if you want 3 sig-figs, or 12 if you only want 2.
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690 feet
0.510
Taper candles come in 2 common sizes, 1/2" or 7/8". they are warped in beeswax and can burn for up to 7 hours depending on the size of the candle. Taper Candles requires a taper candle stand as the bottom of these candles are usually round.
Assuming the '12 inch' is the radius. Then C = 2 pi r C = 2 pi 12 C = 24 pi ( Thr asnswer in terms of 'pi').
The area is 99.0 square units.