Which data set has the same standard deviation as the data set (2,2,5,6,8) ?

a.(5,6,5,6,5)

b. (3,4,4,7,7)

c (3,3,6,7,9)

d (4,4,5,5,5)

Can someone me with this problem . show your work .

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.