Tiny grains of zirconium silicate (zircons) found embedded in ...

[silviawilliams41]

Tiny grains of zirconium silicate (zircons) found embedded in sedimentary rocks have been radiometrically dated to what age?
 
  A) 4.57 billion years ago
  B) 3.85 billion years ago
  C) 4.38 billion years ago
  D) 4.02 billion years ago

Question 2

Which of the following signals from an advanced civilization would be easiest to detect?
 
  A) high intensity, narrow bandwidth
  B) low intensity, wide bandwidth
  C) high intensity, wide bandwidth
  D) low intensity, narrow bandwidth

[connor417]

Answer to Question 1

C

Answer to Question 2

A

[silviawilliams41]

Thanks for the timely response, appreciate it

[TheNamesImani]

Excellent