A bouncy ball is dropped such that the height of its first bounce is 4 feet and each successive bounce is 79% of the previous bounce's height. What would be the height of the 11th bounce of the ball? Round to the nearest tenth (if necessary).

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.