Bianca filled 2 same-sized jars with flavored popcorn as a gift. she wants to glue a piece of ribbon around the edge of each lid. the radius of each jar lid is 4 centimeters. approximately what is the total length of ribbon she will need for the two jar lids? (use 3.14 for .)

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.