Answer:
Step-by-step explanation:
A picture is needed
Choice a is a good one by the way
The formula for conditional probablity states that

Since we know both numerator and denominator, we only need to plug in the values:

Answer:
see the attachment
7 hours
Step-by-step explanation:
The cost for River Y is a constant (not dependent upon hours), so is c = 41.
The cost for River Z is the sum of the deposit and the hourly cost, so is ...
c = 13+4n
These equations and their graphs are shown in the attachment. The graphs cross where n=7, indicating you have to rent a canoe for 7 hours for the cost to be the same on both rivers.