How do you solve this what is 0.399 written as a percent

Given the sequence 7, 14, 28, 56, which expression shown would give the tenth term? a. 7^10 b. 7·2^10 c. 7·2^9

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?