It's Easy to Measure the Circumference of a Tree's Trunk $\ln \hat { h } = - 1.2 + 1.4 ( \ln C$

question 30

Multiple Choice

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 $60 "$ ; how tall does this model estimate the tree to be?

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

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