((There has been a malfunction or this users account may have been deleted))
Answer:
a) 
b) 
Step-by-step explanation:
a) the exponent is 2, therefore the value of
would go in the place of the base.
b) the exponent is 2, therefore the value of
would go in the place of the base =>
= 
20. Because the tickets must have different points of origin, only 1 ticket can be sold per stop.