Answer:
The  value is   
 
Step-by-step explanation:
From the question we are told that 
     The probability of the device failing during the warranty period is 
     The  sample size is  
      The random variable  considered is  x  =  15
Generally this is distribution is binomial given the fact that there is only two out comes hence 
       X  which is a variable representing a randomly selected selected electronic follows a binomial distribution i.e 
      
Now the mean is mathematically evaluated as 
       
 =>   
=>    
The standard deviation is mathematically represented as 
       
=>  
=>   
 Now given that n is very large, then it mean that we can successfully apply normal approximation on this  binomial distribution 
So 
      
 
Now  applying  Continuity Correction we have 
    
Generally  
     
From the z-table  
        
Thus  
      
 
   
     
 
        
             
        
        
        
Answer:
500
Step-by-step explanation:
If 1% is 2.5 then 100% is 250.  Since 250 is half of a number, you went then multiply by 2 to double that number which is 500.
 
        
                    
             
        
        
        
Answer: C) Changing one or more properties of a sine wave in response to data. 
Step-by-step explanation:
Modulation is primarily used in telecommunications sector. It the process by which data is transmitted via electrical signals. It is the process of imposing an input signal on to a wave carrier. It is the pillar of data communication that enables the use information carriers of signals that are electrical and optical. Altering the carrier/ periodic waveform results in Modulation. The amplitude frequency and phase are conveyed. There are different types of Modulation which includes: amplitude Modulation, frequency Modulation, and phase Modulation. 
 
        
             
        
        
        
Answer:
 AREA:
 
 CIRCUMFERENCE:
 
Step-by-step explanation:
 The formula that is used to calculate the area of a circle is:
 
 Where "r" is the radius of the circle.
 The formula for calculate the circumference of a circle is:
 
 Where "r" is the radius of the circle.
 Then, you need to find the radius. This is:
 
 
 Substituting the radius, you get that the area and the circumference are:
 AREA:
 
 CIRCUMFERENCE:
  
 
 
        
                    
             
        
        
        
Answer:
2/15
Step-by-step explanation: