9!/(8!*(9-8)!)=9
or just use a calculator and use the nCr function
        
             
        
        
        
The best way to estimate it is to do "written addition" in your head, adding 1+8, then 9+3, all the way until you get to the front. the actual answer is 189,459, so your answer should be somewhere close to that.
        
                    
             
        
        
        
Answer:
<h2><em>The percent decrease is approximately 40%. </em></h2>
Step-by-step explanation:
Step one:
given data
initial count of fish= 850
final count of fish= 500
Required
% decrease
Step two:
% decrease= final-initial/initial*100
substitute
% decrease= 850-500/850*100
% decrease=350/850*100
% decrease= 0.41*100
% decrease= 40.1%
 
<em>The percent decrease is approximately 40%. </em>
 
        
                    
             
        
        
        
Answer:
The total area is 300 ft^2
Step-by-step explanation:
First find  the area of the rectangle
A = l*w = 24*10 = 240
Then find the area of the triangle on the top
A = 1/2 bh 
The base is 24 and the height is 15-10 = 5
A = 1/2 (24)*5 = 60
Add them together
240+60 = 300
The total area is 300 ft^2
 
        
                    
             
        
        
        
530,000 candles were produced by the factory (rounded of course!) in that month. 
Hope this helps!