This course is designed to give students a thorough review of the mathematics background needed for calculus courses. Topics generally include properties of the real numbers, problem-solving using equations and inequalities, algebraic functions, graphing, and systems of equations. A treatment of trigonometry is also provided as well as applications of exponential functions. The figure shows trajectories of different exponential functions. Each function produces the amount of money at time t in an account if yearly interest is compounded n times throughout the year. The black curve shows the limit as n -> infinity, which indicates that interest is compounded continuously.