The 8th grade students at Fulmore Middle School are trying to raise at least $7500 for the local public library. So far, each of the 198 students has raised an average of
$20. How much more money must each student collect, on average, to reach the
goal?

Consider u = {x|x is a negative real number}which is an empty set? o {x|x eu and x has a negative cube root}o {x|x eu and x has a negative square root}{x|x eu and x is equal to the product of a positive number and -1}{x|x eu and x is equal to the sum of one negative and one positive number?