Which of the following is equivalent to square root of 8?

Can someone me with my hwplz(only the circled ones)

Astore manager records the total visitors and sales, in dollars, for 10 days. the data is shown in the scatter plot. what conclusion can the store manager draw based on the data? question 3 options: an increase in sales causes a decrease in visitors. an increase in sales is correlated with a decrease in visitors. an increase in visitors is correlated with an increase in sales.

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1