Carbon burns with oxygen to produce carbon dioxide gas. which of these shows the correct chemical reaction? a. c + o = co2 b. c + o2 > co2c. c, o, co2d. co2 = c + o

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?