A wire stay 11m long is attached to a telegraph pole at a point A, 8m up from the ground. The other end of the wire stay is fixed to a point B, on the ground. How far is B from the foot of the telegraph pole?

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.