It' S Easy to Measure the Circumference of a Tree $s$

It' s easy to measure the circumference of a tree' s trunk, but not so easy to measure its height. Foresters developed a model for ponderosa pines that they use to predict the tree' $s$ height (in feet) from the circumference of its trunk (in inches) : $\ln \hat { h } = - 1.2 + 1.4 ( \ln C$ ) . A lumberjack finds a tree with a circumference of $60 ^ { \prime \prime }$ ; how tall does this model estimate the tree to be?

A) 11 ,
B) $83 ^ { \prime }$
C) $93 ^ { \prime }$ ,
D) $19 ^ { \prime }$
E) 5 '

Correct Answer:

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