Which of the following are right triangle congruence theorems?

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

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

If sin(x) = 0 and cos(x) = 1, what is tan(x)?