Two triangles are similar and have a ratio of similarity of 2:3. What is the ratio of their perimeter to the ratio of their areas?

A. perimeter 2:3 area 4:6
B. perimeter 4:6 area 2:3
C. perimeter 2:3 area 4:9
D. perimeter 4:9 area 2:3

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.