What kind of triangle is a line

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.

Rewrite so the subject can be y in the formula d=m-y/y+n

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me