Answer:
216 
according to 9*mean(24)
Step-by-step explanation:
 
        
             
        
        
        
4 (e)  
sin^8 x - cos^8 x
= (sin^4 x + cos^4 x)(sin^4 x - cos^4 x)
= (sin^4 x + cos^4 x)(sin^2 x - cos^2x)(sin^2 x +cos^2 x)
=  (sin^4x + cos^4 x)( sin^2 x- cos^2 x)
Sorry I cant do 4 (d).
        
             
        
        
        
 (y+20)=1(x+10); First, we can find the slope by using the equation y2-y1/x2-x1. 
-9+20/1+10 (Accounting for double negatives).
11/11 = 1
The slope of the equation is 1, now we just need to pick a set of points from which we derived the slope from (doesn't matter which) as y1 and x1 in the point-slope equation. (y-y1)=m(x-x1)
Your final answer can either be (y+20)=1(x+10) or (y+9)=1(x-1) but in the context of this question it is (y+20)=1(x+10)
 
        
             
        
        
        
B

 5,000
because the library has more than or = to 5000 books.