Answer:
0.064
Step-by-step explanation:
   25000(1-0.8)^8
= 25000(0.2)^8
= 0.064
 
        
                    
             
        
        
        
Answer:
 11 cm
Step-by-step explanation:
Given:
Length of new pencil = 19 cm
Length of pencil after using a month = 8 cm
Question asked:
The pencil is centimeters shorter now than when it was new = ?
Solution:
Length of new pencil = 19 cm
Length of pencil after using a month =  8 cm
The pencil is centimeters shorter now than when it was new = 19 cm -  8 cm
                                                                                                      = 11 cm
Length of pencil has been used during a month = 11 cm
 
        
             
        
        
        
So, x = 13, x = √3 and x =7i.
now, recall that for an EVEN radical, there are two possible roots, namely is say √3 is say hmmm some value "a", that means that a*a = √3, however, -a*-a is also √3, therefore, ±√3 are two valid values, and therefore -√3 is another one.
now.... keep in mind that, complex solutions or roots, never come all by their lonesome, their sister is always with them, the conjugate, so, for 7i or namely 0 + 7i, her sister is always around, 0 - 7i, which is the other root.
        
             
        
        
        
Answer: 1406
Step-by-step explanation:
Given Table : 
Admissions   Probability 
1,040                0.3 
1,320                0.2 
1,660                0.5
Now, the expected number of admissions for the fall semester is given by :-

Hence, the expected number of admissions for the fall semester = 1406