T=distance over speed
T=40m over 9.8ms
T=answer
I can help you with that if you translate to English
The answer is has no moons. Mars has two moons
Answer: Astronomers use the entire electromagnetic spectrum to observe a variety of things. Radio waves and microwaves – the longest wavelengths and lowest energies of light – are used to peer inside dense interstellar clouds and track the motion of cold, dark gas
I think is A or B it depends on like what the trying to answer