standard_description: For exponential models, express as a logarithm the solution to ab^(ct) = d where a, c, and d are numbers and the base b is 2, 10, or e; evaluate the logarithm using technology.
problem_activity: You deposit $8,000 into an account that pays 4.5% interest, compounded quarterly. How long will it take for you to have $12,000?


aligns: yes