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An investment of 8,600.00 at 4.7% p.a. compounded quarterly is now valued at12,590.72. How long ago was the investment made?the perimeter of a square is 2sqrt(3)cm. Find its diện tíchThe battery life of a certain cell phone starts at 8 hours. The battery life decreases at an annual rate of 30%.a. Write a function that represents the battery life y after x years.if you borrow\$1,040 for 5 years at an annual interest rate of 4% what is the total amount of money you will pay backWhen Christian and Cynthia were married, Cynthia was two years younger than Christian. How old was Christian on his wedding day if 20 years ago he was twice as old as Cynthia