A) 42,000m divided by 2 1/3 = 18,000m divide by 1000m to get km = 18km/hr
B) 18,000m divided by 60 to get minutes = 300m divide by 60 to get seconds = 5m/sec.
        
             
        
        
        
Answer:
That  x is any number  bigger that 5 so 6 plus
Step-by-step explanation:
 
        
             
        
        
        
The emf of a cell is mathematically given as 
 = 0.0532 v
  = 0.0532 v
<h3>What is the emf of a cell?</h3>
Generally, the equation for emf  is mathematically given as

where, 
Pb is lead
H is hydrogen
 / Pb has a standard reduction potential of -0.126 volts, while
 / Pb has a standard reduction potential of -0.126 volts, while 
 /
 /  has a standard reduction potential of 0.0 volts.
 has a standard reduction potential of 0.0 volts.

![[Pb^2^+] x [H^+]^2](https://tex.z-dn.net/?f=%5BPb%5E2%5E%2B%5D%20x%20%5BH%5E%2B%5D%5E2)
 = 0.126 -  0.059/2 log 1  /  [0.57] x [0.09]^2
 = 0.126 -  0.059/2 log 1  /  [0.57] x [0.09]^2
 = 0.0532 v
  = 0.0532 v
Read more about emf 
brainly.com/question/15121836
#SPJ4
 
        
             
        
        
        
See how many others chose something else then graph it.
        
             
        
        
        
6600 BC because that is further in the past than 2500 BC