Jessica has a circular birdbath in her backyard with a radius of 1.25 feet. She wants to place a decorative border around the circumference of the birdbath. If the border costs $3.60 per foot, how much will the border for the birdbath cost Jessica in all? Use 3.14 for .

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.