College Math
posted by Yvonne .
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.
.

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?
Respond to this Question
Similar Questions

history
What goals did the United States achieve by fighting in Korea? 
Typing
When determining wpm (words per minute), does it include typing numbers and symbols (!,@,#...)? 
communication
Social science research indicates which one of the following sequences of events? 
English
I don't really know where to begin with this paragraph. My instructions are to type and revise the following paragraphs so that they’re easy to read as a presentation. Use simple sentence structure. Use correct placement of old and … 
math
A person can type 15 words in 1/4 of a minute. What is his average typing speed in words per minute? 
grammar
I have learned how to formulate personal learning goals SMART. Specific: a learning goal can only useful if it describes what you want to do; how you think, you will do it, when and where. A learning goal must be specific. During the … 
Math
To get a job as a receptionist you have to be able to type 60 words per minute. Trevor wanted to work as a receptionist for the summer so he was working on building up his typing speed. He made the following table to track his progress. … 
Algebra
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 t= 62.5 IN (1 N over 80) according … 
algebra
The learning curves describes the rate at which a person learns certain tasks. If 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 a) according to this formula what … 
math
Justine's typing speed is 36 wpm (words per minute). She finished a job in 5 hours. How long would the same job have taken her if she typed 48 wpm?