A summary should include central ideas and your opinion. central ideas and supporting details. central ideas and the author’s background. central ideas and all minor details.

B. central ideas and supporting details

Explanation:

A summary is basically a recounting of the major points of the article or passage.

It's very objective, which means that it shouldn't include your opinion in it, eliminating A.

The summary is also about the article or passage itself; it shouldn't include information about the author's background. Eliminate C.

Since a summary takes into account just the general main idea of the passage, it shouldn't include all the tiny details that only provide extra descriptors. Eliminate D

Thus, the answer is B.

Hope this helps!

the answer is

r ≈5.641

plug in the area of 100 yards into the equation

100=

divide each side by pi

≈ 31.8309=

take the square root of each side to find r

=r

r ≈5.641