Thank you for the opportunity to help you with your question!

a. A = 5500*(1.06)^2 = $ 6179.8 (answer)

b. 9000 = 5500 *(1.06)^t solving we get t = 10.087 years or 10.09 years (answer)

Please find the solution enclosed here with. In case of any doubt please feel free to ask … If you need help in any assignment of math/ science … any online exam / discussion, Please contact for quick & quality services.