You didn't give your choices but sin 21 equals 0.358.
        
             
        
        
        
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: D
Explanation: Newton’s Law. The more mass two objects have, the greater the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled.
 
        
             
        
        
        
Look for grains cemented together, they can usually be rubbed off easily. It's easily friable and layered due to deposition. It's earthy so it'd be pretty dull and have no crystals whatsoever. etc.