Temperature changes in a certain chemical reaction could be approximately
represented by the quadratic model C(2) = 2x2 - 4x + 17 and the linear
model c(2) = 1.5x + 15.6. Apporximately what is the largest x value where
the 2 models agree?

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.