I need help if help 88 points
First, we find the acceleration for Naomi's force 20/0.5=40 Then we find the acceleration for Cyrus's force 30/0.5=60 Then we subtract them (60-40), which gets us a difference of 20 m/s^2. :)
Naomi exerts an acceleration of 40 m/s^2 and Cyrus exerts an acceleration of 60 m/s^2. This difference shows that Cyrus applied more force than Naomi.