Answer: c. 1.09
Explanation:
The exponential growth equation is given by :-
, where A is the initial amount , r is the rate of growth and x is the time period.
Here growth factor = 1+r
Given: The Initial value = $13,000
Rate of growth = 9%=0.09
Then, the exponential growth equation for the given investment will be

Here , the growth factor = 1.09