Can someone help me? Thank you so much

What is the square root of 45? (step by step working plz)

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

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.