In a coordinate plane , triangle ABC has vertices A (1, 1), B (1,5) and C (5,1). Triangle ABC is dilated by a scale factor of 2 with the origin as the center of dilation, resulting in triangle A'B'C'. What is the length, in units of _ A'B'?
A.) 2
B.) 4
C.) 6
D.) 8

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?