7. In a certain country, the number of people (in millions) using their mobile phones to check emails, t years after 2007, is approximated by N(t) = 20 T+ 2t (0
7. In a certain country, the number of people (in millions) using their mobile phones to check emails, t years after 2007, is approximated by N(t) = 20 T+ 2t (0
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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![7. In a certain country, the number of people (in millions) using their mobile phones to
check emails, t years after 2007, is approximated by N(t) = 20V1+ 2t (0 <t< 8).
a) Find N'(t) using differentiation rules.
b) Calculate N'(0) and N'(7) and interpret their meaning.
c) How many citizens were using mobile phones to check emails in 2015?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fed8a9ba3-5ab4-44b4-acc1-7f7624842712%2F37d6f2c0-33d3-488a-acd4-f5673b38c18e%2Fwbhdby_processed.png&w=3840&q=75)
Transcribed Image Text:7. In a certain country, the number of people (in millions) using their mobile phones to
check emails, t years after 2007, is approximated by N(t) = 20V1+ 2t (0 <t< 8).
a) Find N'(t) using differentiation rules.
b) Calculate N'(0) and N'(7) and interpret their meaning.
c) How many citizens were using mobile phones to check emails in 2015?
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