If Laura travels d d km along the circular ski trail, then the angle subtends an arc d 1.4 d1.4 radius lengths long (starting at the 3-o’clock position) and hence the angle has a measure of d 1.4 d1.4 radians. Recall that we can use this information to determine Laura’s position relative to the center of the ski trail using the sine and cosine functions.

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!

i would say

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.