PLEASE HELP ME. DUETODAY. NEED ANSWER ASAP!!!!!!

Answer: 120 ==> scale
8.4 m==> longer side
Step-by-step explanation:
6 m=
6*100 cm=600 cm
600/5=120 ==> scale
7*120=840 cm
840 cm=
840/100 m=8.4 m ==> longer side