Answer:
Refraction is what happens when light passes through some medium and changes it's direction because of it. For instance, when light travels through a lens light is bent as it goes from air to glass and back to air again. :)
Answer: 21
Step-by-step explanation:
Answer:
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Step-by-step explanation:
No because when you do 3*--9 = 27 and 4*--12 =48
Answer:


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