SOLUTION: It is estimated that light takes 100,000 years (change to seconds) to travel the full distance across our galaxy, the Milky Way. If light travels 3 x 10 ^8 m in one 1 second: H

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Question 991368: It is estimated that light takes 100,000 years (change to seconds) to travel the full distance across our galaxy, the Milky Way. If light travels 3 x 10 ^8 m in one 1 second:
How long is the Milky Way? Give your answer in standard form.
If we approximate the Milky Way to be a disc shape, calculate it's area in standard form.

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1 year=365 days
1 day=24 hours
1 hour=60 minutes
1 minute=60 s
So,
1 year=365%2A24%2A60%2A60=31536000 s
So,
100000+years=3.1536x10%5E%2812%29 s
.
.
.
d=r%2At
d=3x10%5E8%2A3.13536x10%5E%2812%29
d=9.5x10%5E20m
So the distance would be the diameter of the disc,
A=%28pi%2F4%29d%5E2
A=7.0x10%5E41m%5E2