Helpwill have brainley I need help pls!

Create a question with this scenario you could ask that could be answered only by graphing or using logarithm. 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.

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie

Can someone tell me if this is perpendicular? !