Select the option for "? " that continues the pattern in each question.

(1.) 3, -6, 12, 4, 20, ?

(2.) 7, 16, 8, 27, 9, ?

(3.) 2, 7, 26, 101, 400, ?

(4.) 7, 21, 8, 72, 9, ?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Common binomial factor of 6x(3x+7)+5(3x+7)

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.