4. How does the author's discussion of Loeb's equation in paragraph 29 contribute to the
development of ideas in the text?
O A It shows how Loeb's equation depends on the
use of the Drake Equation to determine both
time and place for alien life.
OB It emphasizes the importance of identifying the
likelihood of alien life before attempting to
contact it.
OC It reveals how math guides scientists to get
closer to finding the possibility of alien life, one
variable at a time.
OD It shows how scientists' contact with alien life
relies on Loeb's equation as it determines when
aliens will exist

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.

answer; i believe that the correct answer is (scientific data);

answer: a

explanation: a because she needs to study for her test and get grades for it

at hatfield elementary school, there are 504 students in 7 classes. each class has the same number of students. what is a good estimate of the number of students in each class?