Mobile Instant Messaging AccountsMobile instant messaging (IM) is a small portion of total IM usage, but it is expected to grow sharply. The functionP(t) = 0.257t2 + 0.57t + 3.9(0 sts 4)gives the project mobile IM accounts in year t as a percentage of total enterprise IM accounts from 2006 (t = 0) through 2010 (t = 4).t(a) What percentage of total enterprise IM accounts were the mobile accounts in 2009?%(b) How fast was this percentage expected changing in 2009?% per year

Answered: Image /qna-images/answer/665b55d9-12d0-434f-88d5-2131277c1236.jpg

Answered: Mobile Instant Messaging Accounts…

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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Similar questions

A 12-inch tall sunflower is planted in a garden and the height of the sunflower increases by 8% per day. What is the 1-day percent change in the height of the sunflower? At any given moment, the height of the sunflower is what percent of its height 1 day prior? What is the 1-day growth factor for the height of the sunflower? Write a function f(t) that determines the height of the sunflower (in inches) in terms of the number of days t since it was planted. What does f(4) mean in the context of this problem? If the sunflower is 23 inches tall, then how many days has the sunflower been growing for?
A certain city's population has been in decline since 2010, at which time its population was 100,000. If the population has been decreasing by 4200 people every year, write a function to model the situation with t being the number of years since 2010.
Employment. According to the U.S. Bureau of Labor Statistics, the number of professional services employees fluctuated during the period 2000-2009, as modeled by E(t) = -28.31t³ +381.86t² - 1162.07t + 16,905.87, where t is the number of years since 2000 (t = 0 corresponds to 2000) and E is thousands of employees. (Source: www.data.bls.gov.) Find the relative extrema of this function, and sketch the graph. Interpret the meaning of the relative extrema.
There were around 70,000 black rhinos in the world in 1970. After that, their population declined by a rate of 12.6% annually. Which function best describes the number of black rhinos remaining x years after 1970?
the sides of a square all have a side length of y. Write a simplified function in terms of y for a rectangle whose length is twice the side length of the square and whose width is 2 units longer than the side length of the square. A(y)=
48
Anthropologists can determine a person's height in life by using the person's skeletal remains as a clue. For example, the height (in centimeters) of a man with a humerus bone of length x cm can be obtained by multiplying 2.89 by x and adding 70.64 to the result. (a) Find a function h(x) that gives the height of a man whose humerus bone is x cm long. h(x) = (b) Use your function h from part (a) to predict the height of a man whose humerus bone is 30 cm long. cm
A population of amoebas in a petri dish will triple in size every hour. At the start of an experiment the population is 800. The function , where x is the number of hours, models the population growth. How many amoebas are in the petri dish after 9 hours?

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