Solve the following quadratic equation using the quadratic formula. 5x^2 - 8x + 5 = 0
Write the solutions in the following form, where r, s, and tare integers, and the fractions are in simplest form.

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.