Business math exam

its a online proctor exam for business math I do not know the questions but I do know the section listed below will be on the exam the exam is at 5-8pm on Dec 13 will be around 30-40 question some multiple choice
Percent and Percent Change
Ratios and Proportions
Mathematics of Merchandising
Application of Linear Equations
Simple Interest
Compound Interest: Future Value and Present Value
Ordinary Annuities: Future Value and Present Value
Periodic Payment, Number of Payments, and Interest
Annuities Due
Business Investment Decisions
Loan Amortization and Mortgages
Annuities: Special Situations