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A lumberjack wishes to drive a spike through the center of a tree with a circumference of 43.96 feet. What’s the minimum length of the spike needed to go completely through the tree, passing through the center?

A 14 feet

The minimum length of spike is equal to the diameter of the tree. To find the diameter of the tree, use the formula, C = πd, where C = 43.96, and π = 3.14. 43.96 = 3.14 × d. d = 43.96 ÷ 3.14. d = 14. (remember pi=3.14)