What is the length of the unknown side of the right triangle? (1 point) A) 21
B) 29
C) 400
D) 441

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

What is the distance between the points (2 -3) and (-6 4) on the coordinate plane

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.