\

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 CPI exceeds 350.

\

$\"\"$

\

apply logarithm on each side.

\

$\"\"$

\

$\"\"$ .

\

CPI exceeds after $\"\"$ years

\

\