Can you help me about this question please?

I believe the answer is B

Explanation:

The reason I have chosen this answer is because the passage explains how algae could one day be used to provide energy to whole cities. The rest of the answer choices do not sound correct when I read them.

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

- "the die is cast; i have consented to return if we are not destroyed. thus are my hopes blasted by cowardice and indecision; i come back ignorant and disappointed. it requires more philosophy than i possess to bear this injustice with patience. i have lost my hopes of utility and glory; i have lost my friend."