First, when the student added the layers of wax over each other, this became a representation of sedimentary rocks.
Then the student folded his/her palm and squeezed the layers of wax. This means that the student applied heat and pressure on the wax (sedimentary rocks)
Referring to the diagram below which represents the rock cycle, we will find that applying heat and pressure on sedimentary rocks would convert these rocks into metamorphic rocks.
Based on the above, the best choice would be:<span>d. Heat and pressure can change sedimentary rocks into metamorphic rocks.</span>
 
        
        
        
Answer:
1)
2)
3)
4) 
 
Explanation:
1) 
We can use the following equation:

Here, the initial velocity in the y-direction is zero, the final y position is zero and the initial y position is 25 m.


2)
The equation of the motion in the x-direction is:



3)
The velocity in the y-direction of the stone will be:



Now, the velocity in the x-direction is 15 m/s then the velocity will be:
 
 

4)
The angle of this velocity is:
 
 
 
 
 
 
Then α=55.92° negative from the x-direction.
I hope it helps you!
 
        
             
        
        
        
I love science! if you need any more help let me know i cant guarantee i can help but i will try!
The correct answer is  "Some substances must be dissolved in water before they can be used".