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	Precalculus Functions and Graphs 4/e Barnett/Ziegler/Byleen
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McGraw-Hill is proud to offer you access to a unique online tutorial service, NetTutor.™ An interactive whiteboard, developed by Link-Systems International Inc., makes the electronic rendering of mathematical and scientific notation easy.

NetTutor can be of assistance to you in three distinct ways:

You can access a math tutor via the Internet during regularly scheduled "live" office hours. For the summer session, live office hours will be held every Tuesday, from 2 to 5pm Eastern Standard Time.
You can visit an archive of frequently asked and answered college algebra/precalculus questions. This function is available 24 hours a day, 7 days a week.
You can submit a question to NetTutor via email, and retrieve the answer at a later time. This function is available 24 hours a day, 7 days a week.

This service is limited to those who have purchased a copy of Precalculus: Functions and Graphs 4/e. Your college algebra or precalculus instructor can provide you with the User ID and Password that you will need to access this valuable service. A comprehensive NetTutor™ 2.0 User's Manual is available online at http://www.link-systems.com/nettutor/login.cgi?acode=263-126-7100&book=barnett_prec .

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