Domain and range of: y=x^2-4

y= |x+3|-2

y=x^3-2x+3

y=-x^2+2x-15

x=7

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

Ineed me i stuck and i don’t want to get it wrong

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