Answer:
36
x
2
−
25
=
(
6
x
)
2
−
5
2
=
(
6
x
−
5
)
(
6
x
+
5
)
Step-by-step explanation:
Try this option:
1 meter=1000 mm; 1 hour=60 min. From another side: 1 mm=0.001 m. and 1 min=1/60 h.
Using this rule:
620 mm/h=0.06*620 m/h=37.2 meters per hour.
answer: 0.06
