I DONT UNDERSTAND CAN YOU HELP

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Which expression is equivalent to -5(3x - 6/7)

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.