I think it is 90 :p (Good Luck)
        
                    
             
        
        
        
Question
Help, please!!
How much is 2/5 of 20 ?
Answer:
8
Step-by-step explanation:
20 * 2/5 =
8
----------------------
20 : 5 * 2 = 8
 
        
                    
             
        
        
        
Answer:
0.7026
Step-by-step explanation:
Let X denote the lifetime of light bulb. Given  where the mean is
 where the mean is  .
. 
Recall that,


 
        
             
        
        
        
Answer:
 is valid for all values of x ≥ 0
 is valid for all values of x ≥ 0
Step-by-step explanation:
 
        
             
        
        
        
<h2>
Answer:</h2>
n = 1
<h2>
Explanation:</h2>
Here we have the following Geometric Sequence:

Where:

The first term occurs when  . Next the second term occurs when
. Next the second term occurs when  , the third term when
, the third term when  and so on. Therefore, the appropriate value of n that lies on the domain for n is
 and so on. Therefore, the appropriate value of n that lies on the domain for n is 