The Average Typing Speed N (In Words Per Minute) After $N = \frac { 91 } { 1 + 7.5 e ^ { - 0.15 t } }$

question 53

Multiple Choice

The average typing speed N (in words per minute) after t weeks of lessons is modeled by $N = \frac { 91 } { 1 + 7.5 e ^ { - 0.15 t } }$ . Find the rate at which the typing speed is changing when t = 20 weeks. Round your answer to two decimal places.

• A)2.40 words/min/week
• B)2.70 words/min/week
• C)3.71 words/min/week
• D)4.93 words/min/week
• E)6.24 words/min/week

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Definitions:

Proliferate

To increase rapidly in numbers; multiply.

Infancy

The period in a human's life from birth to the age of two, characterized by rapid growth and development.

Adulthood

A developmental stage characterized by full physical growth, maturity, and the assumption of adult roles and responsibilities.

Cerebral Hemisphere

The cerebral hemispheres are the two halves of the brain, responsible for controlling opposite sides of the body and different aspects of cognitive processing.