Answer:
2, because 2 can only be divided by 1 and itself, and thats what a prime number is 
 
        
                    
             
        
        
        
Answer: 16a^12 b^16
Step-by-step explanation:
Everything in the parenthesis to the 4th power.
2a^4= 16a
3*4=12
b^4*4=b^16
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Consider irght triangle PRS. By the Pythagorean theorem, 

Thus,

Consider isosceles triangle MSC. In this triangle

The area of this triangle is

Consider right triangle PTS. The area of this triangle is

The area of the quadrilateral PMCT is the difference in area of triangles PTS and MSC:

 
        
             
        
        
        
Just asking, what book is it?
        
             
        
        
        
The answer will be 40. As it doubles twice during 220mins- 10 to 20 and then 20 to 40.