Two customers go to a fast food restaurant. The first customer buys 2 hamburgers and 1 French fry for $4.75. The second customer buys 3 hamburgers and 3 French fries for $9.00 How much does each individual item cost ?

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.