If gdp is $20 trillion how many years will it take for a gdp to increase to 80$ trillion if growth is 7 percent

1. are the triangles similar and if so why? what is the value of x? show your work.

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%

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)