Posted by Yvonne on Monday, April 16, 2012 at 2:19pm.
The "learning curve" describes the rate at which a person learns certain tasks. If a person sets a goal of typing N words per minute (wpm), the length of time t (in days) to achieve this goal is given by the following formula. t=62.5ln(1N/80)
(a) According to this formula, what is the maximum number of words per minute?
(b) Solve for N.
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College Math  typo?  Steve, Monday, April 16, 2012 at 4:18pm
ln(x) is only defined for x>0, so 1N/80 > 0
That is, N<80
The problem here is that 1N/80 < 1, so ln(1N/80) is negative. But, t must be positive.
Typo?
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