8.2 - Objectives Section 8.2 More exponential functions...

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1 Section 8.2 More exponential functions Objectives c Graph translations of exponential functions c Write a radioactive decay function c Understand the number “e” and understand how to apply it to interest problems Review – Graph c Now graph ( ) x y 2 2 1 = ( ) x y 2 2 1 - = To graph more complicated exponential functions, we can use a parent function c Use a parent function to graph the given function. Label the horizontal asymptote. 3 2 1 8 2 + = + x y RADIOACTIVE DECAY c The half life of a radioactive substance is the time it takes for half of the material to decay. c Hospitals use different kinds of radioactive elements for imaging; one of these is technetium-99m, whose half-life is 6 hours. Let’s make a table showing the amount of a 100 mg sample remaining at the end of each 6 hour interval for 36 hours. Writing a Model for radioactive decay c Let’s write an exponential function to find the amount of technetium-99 m that remains from the sample after 75 hours. c
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This note was uploaded on 05/13/2011 for the course MTH 98 taught by Professor Johnson during the Fall '09 term at Grand Valley State University.

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8.2 - Objectives Section 8.2 More exponential functions...

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