Step-by-step Answer
PAGE: 167SET: ExercisesPROBLEM: 34
Please look in your text book for this problem Statement

If an initial quantity grove or decays at an exponential rate or , then the final amount after a time is given by the following formula .


Find exponential equation for .

Growth rate of inflation between and .

So the time period is .

CPI in was   and was .

Substitute  , and in .


Exponential equation is .


Find the CPI in .

Growth rate of inflation between and .

So the time period is .



Find when CPI exceeds 350.

Apply logarithm on each side.


CPI exceeds after years, so CPI exceeds after  .

(a) Exponential equation is .


CPI in is .

CPI exceeds after  years.


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