Final answer:
The image size of a cell with an actual diameter of 5 micrometres magnified by a factor of x 200 is 1000 micrometres or 1 millimetre.
Step-by-step explanation:
The question is asking to calculate the image size when a cell with an actual diameter of 5 micrometres is magnified by a factor of x 200. To find the image size, you simply multiply the actual size by the magnification factor.
Therefore, the calculation will be:
Image size = Actual size × Magnification
Image size = 5 micrometres × 200
Image size = 1000 micrometres (or 1 millimetre)
Thus, the image size of the cell when viewed under a microscope with a magnification of x 200 will be 1000 micrometres or 1 millimetre.