What is the unit's digit of 3127 to the power of 173

On a piece of paper graft y+2> -3x-3 then determine which answer matches the graph you drew

Could somebody me with this radical simplification?

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.