Ineed i did it but got it wrong plz

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

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.

Fast! find the length of cu. the triangles are similar. show your work.