Chapter 4.2, Problem 110E

To determine

(a)

To answer:

If the number of symbols per minute that a person using a keyboard can type is given by $f\left(t\right)=250{-120\left(2.8\right)}^{-0.5t}$ where t is the number of months the operator has been in training

To find $f\left(2\right)$

To determine

(b)

To answer:

If the number of symbols per minute that a person using a keyboard can type is given by $f\left(t\right)=250{-120\left(2.8\right)}^{-0.5t}$ where t is the number of months the operator has been in training

To find $f\left(4\right)$

To determine

(c)

To answer:

If the number of symbols per minute that a person using a keyboard can type is given by $f\left(t\right)=250{-120\left(2.8\right)}^{-0.5t}$ where t is the number of months the operator has been in training

To find $f\left(10\right)$

To determine

(d)

To answer:

If the number of symbols per minute that a person using a keyboard can type is given by $f\left(t\right)=250{-120\left(2.8\right)}^{-0.5t}$ where t is the number of months the operator has been in training

The number of symbols per minute after several months of training.