Identify the percent of change as an increase or a decrease 12 inches to 36 inches, increases what is the percent of change %

What is the standard form of -5x^2+2x^4-11+x^3+3x

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?

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?