The formula for circumference of a circle is c=2pi r, where r is the radius

What is the result of the following division?

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.

How do you write y-10=2 (x-8) in standard form