Find the sum of the infinite geometric series. You may state your answer as a fraction or a decimal. Round your answer to four decimal places if necessary. If the sum does not exist, write "none" in the answer box. a1 = 4, r = 2/5 ​

11. minitab software was used to find the lsrl for a study between x=age and y=days after arthroscopic shoulder surgery until an athlete could return to their sport. use the output to determine the prediction model and correlation between these two variables. predictor coef se coef t p constant -5.054 4.355 -1.16 0.279 age 0.2715 0.1427 1.9 0.094 r-sq = 31.16%