Robert was changing the oil in his truck. He dumped the used oil on the ground in his yard. He didn't know it, but Robert was hurting the environment because the oil- HELP FAST

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

Why are people not able to scuba dive in the deep part of the ocean

Suppose that a certain fortunate person has a net worth of $71.0 billion ($7.10×1010). if her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?