Mackenzie and Ariana both found pillows on sale. Mackenzie found a sale that was 4 pillows for $90.00. Ariana found a sale that was 2 pillows for $47.00. Who found the best deal? Explain your reasoning

If eh = hg and hg=16, find the diameter of k

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%

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.