Answer:
400
Step-by-step explanation:
The manufacturer spends $5 to make each widget and sells them for $8.  This means that each widget gives him a profit of $3.
8 - 5 = 3
You need to figure out how many widgets it will take for the manufacturer to make up for the costs each month ($1200).
3x = 1200
(3x)/3 = 1200/3
x = 400
The manufacturer needs to sell 400 widgets.
 
        
                    
             
        
        
        
Answer:
Johnny is wrong.

Step-by-step explanation:
Johnny is wrong.
A better definition would be:  is the set of all elements that belong to at least one A or B.
 is the set of all elements that belong to at least one A or B.
So, the elements that belong to both A and B, like c and d in this exercise, also belong to  .
.
So:

 
        
             
        
        
        
Answer:
   25.920 W
Step-by-step explanation:
Fill in the given number and do the arithmetic.
  P = f(12) = 0.015(12^3) = 25.920 . . . . . watts
 
        
             
        
        
        
Answer:
(a) 8.15
(b) 12.92
Step-by-step explanation:
Given: P = $3000, r = 0.085
                 
Where 
A is the Amount
P is the Principal
r is the rate 
t is the time
(a) For the amount to double, A = 2 × P
                A = 2 × $3000
                A = $6000
                
                
                
Take  of both sides
 of both sides
                
But 
             ∴ 
                
                
                t = 8.15
(b) For the amount to double, A = 3 × P
                A = 3 × $3000
                A = $9000
                
                
                
Take  of both sides
 of both sides
                
But 
             ∴ 
                
                
                t = 12.92
 
        
             
        
        
        
(a) Sample correlation ==> -0.7916
 (b) Standard Deviation for Quantity ==> 801.6816
 (c) Standard Deviation for Price ==> 39.1660
 (d) Relation to coefficient on Price ==> <span>−16.2028</span>