A person is an apple tree farmer. She currently has 20 apple trees per acre, and each tree will yield an average of 285 apples. She is also told that for each additional apple tree she plants per acre, the average
yield of each tree will decrease by 4 apples. How many additional trees should she plant per acre to
maximize her harvest?
trees
Give your answer rounded to the nearest whole number.

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.