Use a graphing calculator to sketch the graph of the quadratic equation, and then state the domain and range. y = negative 5 x squared + 3 x + 10 a. D: (x greater-than-or-equal-to 0.3) R: all real numbers c. D: (x greater-than-or-equal-to 0.3) R: (y less-than-or-equal-to 10) b. D: all real numbers R: (y greater-than-or-equal-to 10.45) d. D: all real numbers R: (y less-than-or-equal-to 10.45) Please select the best answer from the choices provided A B C D

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.