What is the mean of the data set rounded to the nearest tenth
1.2, 1.8, 1.6, 1.4, 1.4, 2.2
a: 1.4
b: 1.5
c: 1.6
d: 9.6

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?