What is the domain of x^3+3x^2-4x=0

Acoin is tossed twice. let e e be the event "the first toss shows heads" and f f the event "the second toss shows heads". (a) are the events e e and f f independent? input yes or no here: yes (b) find the probability of showing heads on both toss. input your answer here: preview

Empty box + box + empty box fill in the box is equal to 30 how

I’m confused on how to work the pie charts