10 points need help asap

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

The function show two sisters' savings account and the rate at which they plan to deposit money

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.