Answer:
6.0×10⁴mm
Explanation:
A speck of dust in an electron microscope is 1.2 * 102 millimeters wide.The image is 5 * 102 times larger than the actual size. How many millimeters wide is the actual speck of dust?
Given
Length of microscope = 1.2×10²mm
If the image is 5×10² larger
Width of the image = 5×10²(1.2×10²)
Width of the image = 5×1.2(10⁴)
Width of the image = 6.0×10⁴mm