Please help with number 5 and 6 please! Thank you

The water has been on the stove y=9.5x+62.1 after how many minutes will the tempature be 138.1 f

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

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%