What numbers are irrantional

What is the missing constant term in the perfect square that starts with x^2 -20x

Iwill give brainliest only if your correct the words subsequent and submerge both contain the prefix sub. based on this information, what does the prefix sub most likely mean? a) under or secondary b) true or verifiable c) tricky or difficult d) around or centered on

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16