Answer:
250:1 scale means that what we see is 250 times smaller.
The diameter of a white blood cell is 0.012 mm.
The width of the grain of sugar under magnification is 17.5 cm.
Step-by-step explanation:
The scale is the ratio ratio between the actual dimensions of an object and the representation of the object (image or drawing).
The magnification scale is used to represent very small objects. The value of the numerator is higher than the value of the denominator, that is, the observed value must be divided by the numerator to know the real value of the object.
Thus, 250:1 scale means that what we see is 250 times smaller.
If the diameter of a white blood cell under magnification appears to be 0.3 centimeters, the real diameter in millimeters will be:
[tex]0.3 cm \times\frac{10mm}{1cm} \times \frac{1}{250} =0.012 mm[/tex]
If the width of a grain of sugar is 0.7 millimeter, the width of the grain of sugar in centimeters under magnification will be:
[tex]0.7 mm \times\frac{1cm}{10mm} \times 250 =17.5 cm[/tex]
