7. larry has $389.00. a dvd player costs $97.00, and he can purchase used movies for $11.55 each. what is
the greatest number of movies larry can buy if he also buys a dvd player?

pls i need !

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.