PLEASE ANSWER!! The perimeter of a rectangular garden is 90 feet. The garden's length is 5 feet fess than 4 times What are the length and width of the garden? water is 15 x 3012-13

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.