Need help on this please help

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

What are the sotions to the quadratic equation 9x^2=4

10% of 1,900,000. show me how you got the answer