What is the value of the expression g * (g+1)^2 for g=2

What is the value of x in the following equation. -x ^3/2 = -27

Use sigma notation to represent the following series for 9 terms.

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.