Answer: I looked it up and it says something about the waves traveling in a solid but I don’t know if that’s correct.
Hope this helps! If in need of clarification, feel free to ask :)
Yes all those are correct, but I don't know what the question was
The distance of the object from the lens is 3.12 cm.
<h3>What is magnification?</h3>
Magnification is the process of of enlarging an apparent size of an object.
<h3>Object distance</h3>
The object distance is calculated using the following lens formula;

where;
- M is the magnification
- V is the image distance
- U is object distance

Thus, the distance of the object from the lens is 3.12 cm.
Learn more about object distance here: brainly.com/question/24894435