A microscope has a scale of 250:1.
What does this scale mean?
The diameter of a white blood cell under magnification appears to be 0.3 centimeters. What is the diameter of the white blood cell in millimeters?
___ millimeters
The width of a grain of sugar is 0.7 millimeters. What will be the width of the grain of sugar in centimeters under magnification?
___ centimeters