Top Posters
Since Sunday
w
5
a
3
j
2
a
2
t
2
u
2
r
2
j
2
j
2
l
2
d
2
y
2
Home Q & A Board Science-Related Homework Help Physics Astronomy
New Topic  
adreamer adreamer
wrote...
Go to Answer
Posts: 891
Rep: 0 0
7 years ago
If the communication lifetime of civilizations in our galaxy is 10,000 years and our galaxy is 13 billion years old, what is the chance of us detecting another intelligent civilization now?
A) 1 in 13,000
B) 1 in 1,300,000
C) 1 in 1300
D) 1 in 130,000
Textbook 
Life in the Universe

Life in the Universe


Edition: 4th
Authors:
Read 72 times
1 Reply
Replies
Answer verified by a subject expert
19Clyde19Clyde
wrote...
#1
Top Poster
Posts: 584
Rep: 11 0
7 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

adreamer Author
wrote...

7 years ago
this is exactly what I needed
jbarnett14
wrote...

Yesterday
I appreciate what you did here, answered it right Smiling Face with Open Mouth
zsc999
wrote...

2 hours ago
This helped my grade so much Perfect
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1467 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 599
  
 495
  
 300
Your Opinion
Who will win the 2024 president election?
Votes: 119
Closes: November 4
Previous poll results: Does a gender wage gap exist in America?