Pre Calc (Compound interest formula) please help?

Stéphanie

New member
A car was valued at $42,000 in the year 1993. The value depreciated to $12,000 by the year 2006.

Use the compund interest formula S= P (1 + r ) ^ t to answer the following questions.


A) What was the annual rate of change between 1993 and 2006?
= ___________ Round the rate of decrease to 4 decimal places.


B) What is the correct answer to part A written in percentage form?
= _________________ %.
 
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