Tom and Mike Are Installing New Flooring in Their Home

Multiple Choice

Tom and Mike are installing new flooring in their home. The house has 5 rooms of approximately equal size where the flooring will be replaced. Tom and Mike spent 3 hours removing the old flooring from the first room. The average time to remove the flooring from 2 rooms is 2.25 hours per room. Determine the learning curve percentage experienced by Tom and Mike. Below are values that may be useful in answering this question. $$\begin{array} { l } \ln ( 95 \% ) / \ln ( 2 ) = - 0.074 \\\ln ( 90 \% ) / \ln ( 2 ) = - 0.152 \\\ln ( 85 \% ) / \ln ( 2 ) = - 0.234 \\\ln ( 80 \% ) / \ln ( 2 ) = - 0.322 \\\ln ( 75 \% ) / \ln ( 2 ) = - 0.415 \\\ln ( 70 \% ) / \ln ( 2 ) = - 0.515\end{array}$$

A) 70%
B) 75%
C) 80%
D) Some other percentage