If the sin 30° = 0.5, then the cos 60° = 0.5
        
             
        
        
        
It has gone through four half-lives of carbon-14 (5730 years<span> x 4 = </span>22920 years<span>)
It is 22920 years old. 
Hope this helps!</span>
        
             
        
        
        
Answer:
17. Laccolith
18. Sill
Explanation:
A laccolith is formed when magma makes its way up a d-ike and lodges itself between sedimentary rocks. The successive flow puts pressure on the rock such that a dome like structure is formed. 
Sills are like mini laccoliths but instead are much smaller and linear. They can appear on multiple layers as shown in the diagram above. 
 
        
             
        
        
        
Answer:
I already answered this on your other post but here it is again so i can get the extra 5pts
Explanation:
Neptune is surrounded by unusual rings, which aren't uniform, but possess bright thick clumps of dust called arcs. The rings are thought to be relatively young and short-lived.
 
        
             
        
        
        
Answer:
D
Explanation:
Our Axis Always point towards the north star no matter where we are in the orbit.. Hope it works