The surface area of a right circular cone is 15π in.. the cone is enlarged by multiplying both the radius of the base and the slant height by 4. what is the surface area of the new cone?
a. 80π in.
b. 120π in.
c. 60π in.
d. 240π in.

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.