Which number doesn't belong? 11-16-4-8-2?

Can someone answer this question without telling me to try my best if i don’t finish my flvs work will i not be able to move to the next grade

Idon’t understand 8. plz ! we are finding the area of polygons. thx in advance!

Evidence suggests that the ancient romans had a very formal medical system. it included which of the following? click all that apply. medical schools universities physician apprenticeships nursing homes hospital facilities