I do not understand ur language I speak English very well sorry I can't help you with your homework
        
             
        
        
        
Answer:
1. The expected pay-out on each policy is 250 * 1/90 + 12000 * 1/100 + 17000 * 1/400 = $165.  So that's what the premium would have to be in order to get a profit of 0.
  
2. The profit per policy is the premium the company receives minus the expected payout = 350 - 165 = $185.
  
3. The expected profit on 375 policies would be 375 * 185 = $69375
Step-by-step explanation:
 
        
             
        
        
        
The answer is -4 2/3 
Explanation : The elevator is at 0, and went below ground level 90 feet, that would be -90, then it went up 20 feet, which would be -90 + 20 = -70
-70 ft / 15sec = - 4 2/3 
I am not sure about the ground level and negative difference but that it is what I was taught. Below ground level is negative and above is positive. Therefore the elevator traveled up and it traveled -4 2/3 per second. 
It so either 4 2/3 or - 4 2/3 but pretty sure it is - 4 2/3. 
:)))
        
             
        
        
        
Answer: 11 square root 57
Step-by-step explanation: