This isn’t a homework problem, but my daughter is preparing for a science competition. She got assigned questions about microbiology - not her choice.
So, if I may ask, how would you solve this?
A cell is observed to take up about half the field of view at 4x magnification (under a light microscope). What is the length of the organism?
Is there really enough info here to answer the question? And, if so, please explain the approach.