Compound Interest Practice

Thanks to Stacy Eaton and Laura Wetmore for explanations, activity based on slides linked here:https://docs.google.com/presentation/d/1HT3eUWOT6LWN-MnwU11z98ng_pI82a6unwiDJH5barE/edit#slide=id.g25358a557e_0_0

By Rebecca McKee