SOLUTION: can you help me with this problem China is one of the biggest potential markets for US autos. In 2010, there were 1.38E8 car owners in China and the number was growing with a doub

Question 767982: can you help me with this problem
China is one of the biggest potential markets for US autos. In 2010, there were 1.38E8 car owners in China and the number was growing with a doubling time of 6.3 years. How many car owners would you predict for that country in 2020? Owners (E notation, 2 decimals)??
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
For now, say there are car owners in China in 2010
Also, for now, say the number doubles every years
Let = current number of car owners
-----------------
After years, there are:

After years, there are

-----------
So, the general formula would be
where k*t is the years
since 2010
------------
From 2010 to 2020 is years, so

------------------
In 2020, there will be:

------------------
I can't find my calculator, but you need to convert
to a number that looks like a.aaa x 10^n
Then multiply by
Then get it back to looking like a.aaa x 10^n

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