What is the distance between points A(1,9)and(4,-2)

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

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

Write the fraction or mixed number and the decimal shown by the model