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The following table gives the number of worldwide cell phone subscribers, in billions, for selected years from 2010 and projected to 2020. Complete parts (a) through (e). Year 2010 2011 2012 2013 2014 2015 Subscribers (billions) 5.39 6.05 6.64 7.18 7.63 8.02 Year 2016 2017 2018 2019 2020 Subscribers (billions) 8.29 8.56 8.77 8.94 9.06 D a. Find a quadratic function that models the number of subscribers, Q(t), in billions, as a function of t, the number of years after 2010. Q(t) = (Type an equation. Type integers or decimals rounded to three decimal places for any numbers in the equation.)

The following table gives the number of worldwide cell phone subscribers, in billions, for selected years from 2010 and projected to 2020. Complete parts (a) through (e). Year 2010 2011 2012 2013 2014 2015 Subscribers (billions) 5.39 6.05 6.64 7.18 7.63 8.02 Year 2016 2017 2018 2019 2020 Subscribers (billions) 8.29 8.56 8.77 8.94 9.06 D a. Find a quadratic function that models the number of subscribers, Q(t), in billions, as a function of t, the number of years after 2010. Q(t) = (Type an equation. Type integers or decimals rounded to three decimal places for any numbers in the equation.)

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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The following table gives the number of worldwide cell phone subscribers, in billions, for selected years from 2010 and projected to 2020. Complete parts (a) through (e). Year 2010 2011 2012 2013 2014 2015 Subscribers (billions) 5.39 6.05 6.64 7.18 7.63 8.02 Year 2016 2017 2018 2019 2020 Subscribers (billions) 8.29 8.56 8.77 8.94 9.06 a. Find a quadratic function that models the number of subscribers, Q(t), in billions, as a function of t, the number of years after 2010. Q(t) = (Type an equation. Type integers or decimals rounded to three decimal places for any numbers in the equation.)
Transcribed Image Text:The following table gives the number of worldwide cell phone subscribers, in billions, for selected years from 2010 and projected to 2020. Complete parts (a) through (e). Year 2010 2011 2012 2013 2014 2015 Subscribers (billions) 5.39 6.05 6.64 7.18 7.63 8.02 Year 2016 2017 2018 2019 2020 Subscribers (billions) 8.29 8.56 8.77 8.94 9.06 a. Find a quadratic function that models the number of subscribers, Q(t), in billions, as a function of t, the number of years after 2010. Q(t) = (Type an equation. Type integers or decimals rounded to three decimal places for any numbers in the equation.)
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