Answer: The answer is (c) ln 4768 = 5x.
Step-by-step explanation: The given equation is

We are to find the logarithmic form of the above equation.
We will be using the following properties of logarithm :

The solution is as follows:

Thus, the correct option is (c).
Area = pi * radius^2
radius = diameter/2 = 26/2 = 13 feet
Area = 3.14 * (13^2)
Area = 3.14 * 169 = 530.66 ft^2