To what subsets of real numbers does 4. belong?

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

Need same math paper but the back now i hope your able to read it cleary i need with hw

B. two events are dependent if the occurrence of one event changes to occurrence of the second event. true or false