What is the doubling time for the function $f(x)=9(1.2)^{x}$ ? 8.25 3.802 1.44 12.96 Not enough information

Step 1 ：The doubling time for an exponential function is given by the formula T = ln(2)/ln(b), where b is the base of the exponential function.

Step 2 ：In this case, b = 1.2.

Step 3 ：So, we need to calculate T = ln(2)/ln(1.2).

Step 4 ：Using the formula, we get T = 3.8017840169239308.

Step 5 ：So, the doubling time for the function \(f(x)=9(1.2)^{x}\) is approximately \(\boxed{3.802}\).