Homework Help: geometry

Posted by Brandon on Tuesday, March 6, 2012 at 3:28pm.

A microscope shows you an image of an object that is 80 times the actual size. Therefore, the scale factor of the enlargement is 80. An insect has a body length of 7 millimeters. What is the body length of the insect under the microscope?
I know it's 560, but not sure if millimeters or centimeters. How do you know?

geometry - Steve, Tuesday, March 6, 2012 at 3:38pm
units don't change by scaling

if you had a box of apples, and you upsized the box, would it now be full of oranges?

so, if it stated out as 7mm, it ends up as 80*7mm = 560mm
geometry - Brandon, Tuesday, March 6, 2012 at 3:39pm
Thank you that is what I thought but then I was second guessing myself on changing to centimeters.

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