4) at the end of the summer, i decide to drain the swimming pool. i noticed that it drains faster when there is more water in the pool. that was interesting to me, so i decided to measure rate at which it drains. i found that it was draining at a rate of 3% every 5 minutes how many gallons are left in the pool after 50 minutes?

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.