Question

The image of a dust mite from a scanning electron microscope is 1.5×10 to the 2nd millimeters wide. The image is 5×10 to 2nd times life size. How many millimeters wide is the dust mite?

Answer 1

600 millimeters is the accuracy

Answer 2

Given that The image of a dust mite from a scanning electron microscope is $1.5 \times 10^2$ millimetres wide. And that image is $5 \times 10^2$ times life size. Now we have to find how many millimetres wide is the dust mite. To find that we just need to divide the the width of dust mite by the scale value of microscope. I mean divide $1.5 \times10^2$ millimetre by $5 \times 10^2$

So the answer is given by

Width of the dust mite $=\frac{1.5 \times 10^2}{5 \times 10^2} =\frac{1.5 }{5 } =0.3$

Hence final answer is 0.3 milimetre.