What's the equivalent expression

Which type of graph would allow us to compare the median number of teeth for mammals and reptiles easily

In the diagram of circle o, what is the measure of zabc?

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.