The radii of two similar cones are 27:125. What is the ratio of their areas?

What is the smallest integer n such that n\sqrt{2} is greater than 20

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

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.