Amerchant buys an old carpet for $25.00. he spends $15.00 to have it restored to good condition and then sells the rug for $50.00. what is the percent profit on his total investment?

Students are getting signatures for a petition to increase sports activities at the community center. the number of signatures they get each day is 3 times as many as the day before. the expression 3^6 represents the number of signatures they got on the sixth day. how many signatures did they get on the first day?