If you have a 100 point test and you have a c, what grade will you have if u get a d if

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

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.