A=10^4/10^3x10^-3
A=(10^4x10^-3)/10^3
A=10^1/10^3
A=10^-2
B=(10^-3)^4/10^-6
B=10^-12/10^-6
=10^-12x10^6
=10^-6
4)
Mercure
58x10^9
t=58x10^9/3x10^8=58x10/3=193.3s
t=193,3s
t=193,3/3600=0,0536h
t=193,3/60=3,21min
Terre
t=150x10^9/3x10^8=20x10=500s
t=500/3600=0.138h
t=500/60=8.33min
Pluton
t=5900x10^9/3x10^8=5900x10/3=19666.6 s
t=19666.6/3600=5.46h
t=19666.6/60=327.7 min
