What are three ratios equivalent to 5: 2

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

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

What is the solution to the equation below? 3/x-2+6=square root x-2 +8