The plural form of the word radius is <em>radii</em>.
I know it sounds weird, but this is correct. Adding <em>-s </em> at the end of the radius would make the word grammatically incorrect. This is because the word radius itself is a Latin word.
- Marlon Nunez
The answer is A. Hope this helped.
Answer:
D. Emily is worried about David.
Explanation:
YES
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