Question

a grain of sand has a diameter that is 2 mm long. under a magnifying glass, it looks 20 mm long. what magnification scale was used? hint: scale factor = \frac{scaled image dimension}{original dimension}

Explanation:

Step1: Identify values

Scaled image dimension = 20 mm, Original dimension = 2 mm

Step2: Apply scale - factor formula

Scale factor=$\frac{Scaled\ Image\ Dimension}{Original\ Dimension}=\frac{20}{2}$

Step3: Calculate result

$\frac{20}{2}=10$

Answer:

10