Plug the numbers into the exponential growth formula: [tex]60100× (1+ \frac{x}{100}) ^{11} [/tex] Now work backwards to get the answer: 1)Divide 120150 by 60100 to get 1.998668885 2) Find the 11th root of ANS: [tex] \sqrt[11]{1.998668885} =1.064976629[/tex] 3) Minus 1 from your answer to give 0.064976629 4)Multiply your answer by 100 to give you the rate of x%, which is 6.5 to 1d.p x=6.5 (1 d.p.) Btw, this answer also works if you plug it back into the equation
