Mr. peterson will buy 80 feet of fencing. the pieces of fence come in whole numbers of feet. his enclosure will be a rectangle and have 4 sides. if he wants to enclose the greatest area, what should be the length, width, and area?

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.