C. it cannot be used again!
The degree of vertex D is if it is an indegree or outdegree, it is 1 degree in vertex D.
A jar contains 12 marbles 4 red 3 white 5 blue. A marble is randomly selected, it's color record, and then the marble is returned to the jar. A second marble is randomly selected. Find the probability that both marbles selected are blue
Answer:
<u>Pluto is dwarf planet composed of nitrogen ice, methane and carbon monoxide.</u>
Explanation:
Designated as a minor planet pluto is considered to be on the outer boundaries of the planets, being found in the 1930s is the ninth largest and the tenth object orbiting the sun.
Its atmosphere is mainly composed of methane, nitrogen and carbon monoxide and ice. Having a mass of that of the moon, it has mountains made up of ice masses its color varies from dark brown to orange to white. The latest studies show that pluto has an age of more than 180,000 years.
According to some studies it has mass wasting and tectonic like processes in operational at its surface. It is surface gravity is 0.63g and has five known natural satellites. A mean density of 1.854±0.006 g/cm cube.
