Answer:
The percent of the area under the density curve where  is more that 3 is 25 %.
 is more that 3 is 25 %.
Step-by-step explanation:
Since the density curve is a linear function, the area under the curve can be calculated by the geometric formula for a triangle, defined by the following expression: 
 (1)
 (1)
Where:
 - Area, in square units.
 - Area, in square units.
 - Base of the triangle, in units.
 - Base of the triangle, in units.
 - Height of the triangle, in units.
 - Height of the triangle, in units. 
The percent of the area is the ratio of triangle areas under the density curve multiplied by 100 per cent, that is:


The percent of the area under the density curve where  is more that 3 is 25 %.
 is more that 3 is 25 %.
 
        
             
        
        
        
The total charge would be $445.
Hope this helps!!
        
             
        
        
        
Answer:
1 is 1/2 5 is 2 1/2 and 7 would be 3 1/2
Step-by-step explanation:
 
        
             
        
        
        
Answer:
$190.50
Step-by-step explanation:
Expected value is the sum of each possible income multiplied by its probability.
There's a 5% chance that the vendor makes $200 and loses $190 (net gain of $10).
There's a 95% chance that the vendor makes $200 and loses $0 (net gain of $200).
So the expected value is:
Exp(RS) = $10 × 0.05 + $200 × 0.95
Exp(RS) = $190.50
 
        
             
        
        
        
           3 + 1 < 10
There's no question there, and nothing to solve.  That's a simple statement 
which, after simplifying it slightly, says " 4 < 10 ".
A statement with which, I'm sure, we can all agree.