This one is for 15 pts. the next question is for 20

a = 0.75 m/s²

Explanation:

I am not gonna rewrite the stuff from previous answers, it's the same format.

a = average acceleration  

v = final velocity = 9 m/s  

v0 = initial velocity = 3 m/s

t = time = 8 s

a = (v-v0)/t

a = (9m/s - 3m/s) / 8s

a = 0.75 m/s²

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!