Answer:
The radius of the circles are  and
  and   
Step-by-step explanation:
Let
x-----> the radius of larger circle
y----> the radius of smaller circle
we know that

 -----> equation A
 -----> equation A
Remember that
 -----> equation B
 -----> equation B
substitute equation B in equation A and solve for y





Find the value of x


therefore
The radius of the circles are  and
  and   
 
 
        
             
        
        
        
Answer:
the number of miles is 160 
Step-by-step explanation:
The computation is given below:
Let us assume the miles be x
For company A 
y = $100 + $0.40x
And, for company B 
y = $20 + $0.90x
In order to find out the number of miles, the rental cost of the company A should be less than the company B rental cost
SO, 
$20 + $0.90x > $100 + $0.40x
Subtract $20 from both sides
0.90x > 80 + 0.40x
Now subtract 0.40x from both sides
0.50x >80
x>160
So the number of miles is 160 
 
        
             
        
        
        
Answer: a) 0.84  b) 0.67  c) 1.28
Step-by-step explanation:
Using the standard normal distribution table for z-value , we have
(a) The value of  would result in a 80% one-sided confidence interval :
 would result in a 80% one-sided confidence interval : 
(b) The value of  would result in a 85% one-sided confidence interval :
 would result in a 85% one-sided confidence interval : 
(c) The value of  would result in a 90% one-sided confidence interval :
 would result in a 90% one-sided confidence interval : 
 
        
             
        
        
        
Answer:
Quadrant 1 (1,5)
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
help
Step-by-step explanation: