Astudent wants to write an expression for, "all of the elements which are in set a or
b". which expression below matches the statement?
a. (a’ u b’)
b. p(a n b)
c. ( a n b)
d. (a u b)

In stepmber, daniel and justin opened a business. during their first three months of business, their average monthly profit was $51. if during their first month, they lost $29, and during their second month, they gained $115, what was their profit or loss for their third plzzz i will give you 299 points