The cost of building a deck varies directly with the area of the deck. if a 6-foot by 9-foot deck costs $2,160, find the cost of building a 9-foot by 12-foot deck.

Which of the following describes the symmetry of the graph of y = x3?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.

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.