Can someone explain the heart of alebra. tips, strategies etc

Iknow this isn't a question, but is there someway to ask a question under public safety or is there no category for it? i don't know if i'm overlooking it or not.

What are the three stages of volcanic activity? a. active, magma, lava c. extinct, eruption, explosive b. eruption, quiet, explosive d. active, dormant, extinct

Mr. chiu made a dot plot after asking his students a question. based on the dot plot, which statements are correct? check all that apply. eleven students answered mr. chiu's question. twelve students answered mr. chiu's question. three people studied for two hours. three people studied for three hours. everyone who responded studied for at least one hour. four people studied for four or more hours