Greatest common factor of 40,100,20

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

1. what is the measure of ∠abc? what is the measure of ∠abd?

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%