Ok here's an easy one,( and I already know the answer.)what is 12 x 13?

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

Which expression gives the area of the triangle shown below

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left