Long wants to save $87 for tickets to a rock concert. if she has $23 now and will save 4 per week, how long will it take her to get enough money to buy the tickets? define a variable and then write and solve and equation. write your solution as a sentence

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.