28 is 12 less than k. k=?

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.

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?

Yvaries inversely as x. y =12 when x=5. find y when x=4