Chana and Josiah started skating at the same time in the same direction, but Josiah had a head start 101010 meters past the starting line. Chana skated 333 meters per second and Josiah skated 222 meters per second.

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?