Answer:
371pm
Explanation:
To calculate the actual size of the cell, divide the image size by the magnification.
52,000pm ÷ 140X = 371.4285....pm
≈ 371pm
Round based on the number of decimals in the question.
Round down because the first decimal place is less than 5. If the first decimal was 5 or more, round up (to 372).