Find the 25th term of the arithmetic sequence ‒7, ‒4, ‒1, 2, 2. in an arithmetic sequence, if a4 = 18 and a10 = 30, determine a1, d, and an. then write the first four terms of the sequence. 3. in a geometric sequence, if a3 = ‒5 and a6 = 40, determine a1, r, and an. then write the first three terms of the sequence.

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.