Question: The average typing speed N (in words per minute) after t weeks of lessons is modeled by the learning curve function N(t) :=951+8:5e 0:12t :

The average typing speed N (in words per minute) after t weeks of lessons is modeled by the "learning curve" function N(t) :=951+8:5e 0:12t : Find the rates at which the typing speed is changing when t =5 weeks and when t =30 weeks. What happens to N when t !+1?

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