I need help with some of these questions so i can continue thanks.

8. + 0/1 points Previous Answers AufExc4 11.2.022. My Notes + Ask Your Teacher Calculate the present value. (Round your answer to two decimal places.) A = $15,000, r = 9% compounded monthly, t = 7 years $ 1186.30 X Need Help? Read it Talk to a Tutor Submit Answer Practice Another Version 9. + -/1 points AufExc4 11.2.055. My Notes + Ask Your Teacher Suppose your salary in 2015 is $70,000. Assuming an annual inflation rate of 7%, what salary do you need to earn in 2021 in order to have the same purchasing power? (Round your answer to two decimal places.) $ Need Help? Read it Talk to a Tutor 10. + -/1 points AufExc4 11.2.061.MI. My Notes + Ask Your Teacher Calculate the effective annual rate for an investment that earns the given rate of return. Round to the nearest hundredth of a percent. 6.6% interest compounded quarterly % Need Help? Read it Watch It Master It Talk to a Tutor