Answer:
B) b√a
Step-by-step explanation:
b√a
 
        
             
        
        
        
Answer:
55:5
121:11
Step-by-step explanation:
 
        
             
        
        
        
Answer:
y = 5/2x -15
Step-by-step explanation:
5x - 2y = 30 
-2y = -5x + 30 
y =  x -15
x -15 
 
        
                    
             
        
        
        
Answer:
3 litros
Step-by-step explanation:
Joana alugou um carro para fazer uma viagem de 36km sabendo que o carro percorre 12 km cm 1 litro custa
Da pergunta:
12 km = 1 litro
36km = x
Cross Multiply.
12x = 36 × 1
x = 36/12
x = 3 litros
 
        
             
        
        
        
Answer: (60.858, 69.142) 
Step-by-step explanation:
The formula to find the confidence interval for mean :
 , where
 , where  is the sample mean ,
 is the sample mean ,  is the population standard deviation , n is the sample size and
 is the population standard deviation , n is the sample size and  is the two-tailed test value for z.
 is the two-tailed test value for z.
Let x represents the time taken to mail products for all orders received at the office of this company.
As per given , we have
Confidence level : 95%
 n= 62
sample mean :  hours
 hours
Population standard deviation :  hours
 hours
z-value for 93% confidence interval:  [using z-value table]
  [using z-value table]
Now, 93% confidence the mean time taken to mail products for all orders received at the office of this company :-

Thus , 93% confidence the mean time taken to mail products for all orders received at the office of this company : (60.858, 69.142)