Final answer:
The rosebush should be planted 5.5 feet from each end of the border, as it is to be placed exactly halfway along the 11-foot-long border.
Step-by-step explanation:
The question asks where to plant a rosebush in an 11 feet long border, such that it is positioned halfway along the border. To find the distance from the ends of the border to the rosebush, you need to divide the total length of the border by 2, because halfway means the border will be split into two equal lengths.
So, if the border is 11 feet in total, the calculation will be as follows:
Thus, the bush would be planted 5.5 feet from each end of the border. The correct answer to the question is B) 5.5 feet.