Answer:
The opposite of prime numbers are composite numbers. A composite number is a positive  natural l number that has at least one positive divisor other than one or itself. The number 1 is not a prime number by definition - it has only one divisor.
Step-by-step explanation:
 
        
             
        
        
        
To convert any unit to it's "milli-" form always multiply the given value by 1000. The new value will be the value of in the "milli-" form.
The question asked to us is to convert 3.521 g to mg (or milligram). Thus, all that we need to do is to multiply 3.521 with 1000 and we will get the corresponding value in milligrams. Thus, in mg, 3.521 g is:
 mg
 
        
                    
             
        
        
        
I think it’s the second one
        
                    
             
        
        
        
49,000 is the nearest round to the hundredth to 48,950