Geoff invests $1,200 in a certificate of deposit (CD) that earns 1.05% in interest compounded biannually, which means that he earns 1.05% of his existing money twice per year. The money he makes in interest is added to his account balance and rounded to the nearest cent. After 2 years, the CD matures. Geoff decides to use $400 of the funds to purchase a tablet and invest the remaining balance in another CD. How much money did Geoff invest in this second CD?

The ACT Mathematics Test contains 60 questions to be answered in 60 minutes.  The hardest ACT math questions (the last 10 to 15 questions) fall into two types: advanced concepts and complex questions. Advanced concepts questions cover what you learn in precalculus and trigonometry. FYI: Students that get into Harvard College have an ACT score of 34–36.