The document contains examples of mathematical formulas and problems. The first example calculates the amount left in an account after 32 years with an initial principal of $1500 earning 4.5% interest compounded semi-annually. The second example calculates the cost to wrap 24 pepsi cans individually for a birthday gift based on the dimensions of each can and a cost of $0.25 per square centimeter of wrapping paper. The final section lists homework problems from page 307 numbers 1 through 7.