Which of the following are known to exist on the moon? select all that apply.
a. air
b. ice
c. life
d. basalt

Ice and Basalt.

B. and D.

Explanation:

In 2018, it was confirmed by NASA that water ice exists on the surface of the moon.

In 1972, lunar basalt was picked by astronauts Eugene Cernan and Harrison Schmitt who were on the Apollo 17 mission.

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.  

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation: