As of 2007, the world's population stands at approximately:
a) 3 billion persons.
b) 6.7 billion persons.
c) 9.8 billion persons.
d) 11 billion persons.

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

In 2004 how many nightly car accidents were there

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