C = pi * d
C = 3.14 * 15
C = 47.1 inches
47.1 / 6 = 7.85
She could use 7 or 8 candles. I suggest 7 candles since she wouldn't want to put them exactly on the edge.
Blair is decorating a birthday cake with candles. The cake has a diameter of 15 inches. She wants to place the candles about every 6 inches around the edge. How many candles will she need?
How could i solve this problem?
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