Rita and tina each make $11 an hour working as cashiers at a supermarket. last week, rita worked r hours while tina worked t hours. rita also worked overtime hours during the week, for which she was paid an extra $32 flat wage. which expressions represent the total weekly wages of both rita and tina?

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.