Answer:
Answer is b. Cannot see the attached image though.
Explanation:
The area is 23x20 which = 460 sq ft.
If each sq foot gets 1250 flakes per min, it gets 75,000 in an hour.
The whole lawn gets 34,500,000 flakes in one hour, which would weigh 75,900,000 mg.
This equals 75.9 kg
I'm pretty sure the aswer is B.
Luminosity represent the star's lifetime because it shows how bright they are. does that help?