Answer: D. Between 80 and 90 kilometers per hour 
Explanation: All you have to do is multiply 1.57 x 55 (which equals 85.35). Not to be mean but all you have to do is read the answer carefully :)
        
                    
             
        
        
        
The vertex is (-1,0). you can find this after putting the equation in standard form by completing the square. 
        
                    
             
        
        
        
Answer:
x ≈ - 1.28
Step-by-step explanation:
Using the rule of logarithms
 x = n ⇔ x =
 x = n ⇔ x = 
Given
ln(x + 4) = 1 , then
x + 4 =  ( subtract 4 from both sides )
 ( subtract 4 from both sides )
x =  - 4 = - 1.28 ( to the nearest hundredth )
 - 4 = - 1.28 ( to the nearest hundredth )
 
        
             
        
        
        
Answer:
Percy used 77 liters to wash
Step-by-step explanation:
This question can be solved using a rule of three.
Each minute of washing costs 7 liters.
She washed for 11 minutes.
So
1 minute - 7 liters
11 minutes - x liters
x = 7*11 = 77
Percy used 77 liters to wash