The magnification factor of the animal cell in the image is 2400 since the actual size of the animal cell is 10 micrometers.
The image shows the cell in millimeters (mm) we compare the two, we need to convert one of the units to match the other. Since magnification is usually expressed as a dimensionless ratio, it's best to convert the image size to micrometers as well.
The magnification factor of an animal cell is the ratio of the image size to the actual size of the cell. The actual size of an animal cell is typically around 10 micrometers, and the size of the cell in the image is 24 millimeters. Therefore, the magnification factor is:
24 millimeters / 10 micrometers
= 2400