3: Mathematics and Finance Last updated Save as PDF Page ID 128386 3.1: Simple and Compound Interest We have to work with money every day. Balancing your checkbook or calculating your monthly expenditures on espresso requires only arithmetic, but we need more complex mathematics when we start saving, plan for retirement, or need a loan. 3.2: Annuities and Loans 3.3: Continuous Compounding 3.4: Federal Budgets and National Debt Contributors and Attributions Saburo Matsumoto CC-BY-4.0