Answered: Until Summer 2012, if you wanted an…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Quantitative Reasoning 2. Until Summer 2012, if you wanted an iPhone you needed to lock into a two-year contract. Then some mobile companics started selling the iPhone and letting you choose your own plan, with no contract. You can use the ideas from chapter 7 to make a quantitative comparison. Virgin Mobile began selling a 16 GB iPhone 4S for $649.99, with no plan or contract. They offered a $55 per month "unlimited" data plan (in fact it was not unlimited, as once you got past 2.5 GB of data they slowed the phone speed down considerably). If you purchased the phone through Sprint, it cost just $149.99. However, you had to sign up for a two year contract. The least expensive option was $79.99 with what they called unlimited data. (a) For each plan, find a linear function what shows how the total cost of the phone depends on the number of months you have it. • Virgin Mobile: y= . Sprint: y= (c) Clearly the Virgin Mobile plan is more expensive at first. When does it become the less expensive plan? (d) If you had to choose one of the plans, which would you choose and why? What other factors would you consider?

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