Final answer:
The size of the 2 μm medulla under a compound microscope with a 10x objective and 10x ocular will be 0.00002 mm.
Step-by-step explanation:
The magnification of a compound microscope is determined by the combination of the objective lens and the ocular lens. In this case, the objective lens has a magnification of 10x and the ocular lens also has a magnification of 10x. To calculate the total magnification, you multiply the magnification of the objective lens by the magnification of the ocular lens. So, the total magnification is 10x * 10x = 100x.
The size of the medulla can be determined by dividing the actual size of the medulla by the total magnification. In this case, the actual size of the medulla is 2 μm. So, the size of the medulla under the microscope will be 2 μm / 100 = 0.02 μm or 0.00002 mm.