Which geologic era lasted the longest?
a) the cenozoic
b) the mesozoic
c) the paleozoic
d) the precambrian

Why did southern business leaders want to increase the number of slaves

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

Mr. rose asked his student to draw a quadrilateral with four unequal sides. an example of this kind of quadrilateral