What is the sum of the interior angles of the polygon shown below

And employee salary increased by $4500 which represents a 15% raise what is the rate of the increase

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin

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?