This circle is centered at the point (4,5), and the length of its radius is 3. what is the equation of the circle?
o a. (x - 5)² + (x-4)² = 9
o b. (x + 4)2 + (y + 5)2 = 3
o c. (x-4)² + (x - 5)2 = 9
o d. (x²-4) + (7-5) = 32

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.