...dgets than she had sold on the previous day. How many widgets in total had Janabel sold after working <math>20</math> days? First, we recognize that the number of widgets Janabel sells each day forms an arithmetic sequence. On day 1, she sells 1 widget, ...

...dgets than she had sold on the previous day. How many widgets in total had Janabel sold after working <math>20</math> days? ...

Massachusetts placed fifth in 2016. Team: Ben Epstein, Angelina Zhang, Janabel Xia, Srinivasan Sathiamurthy ...