Variable Costing Income Statement for a Service Company

East Coast Railroad Company transports commodities among three routes (city-pairs): Atlanta/Baltimore, Baltimore/Pittsburgh, and Pittsburgh/Atlanta. Significant costs, their cost behavior, and activity rates for April are as follows:

Operating statistics from the management information system reveal the following for April:

a. Prepare a contribution margin by route report for East Coast Railroad Company for the month of April. Compute the contribution margin ratio. Rounded to one decimal place. If required, use the minus sign to indicate a negative contribution margin.

This week you listened to an episode of “How I built This” featuring AirBnB. This company has an interesting story in that it created a unique business model inside of a competitive hospitality industry. For this assignment you will be analyzing the external environment of AirBnB. Please do whatever additional research is necessary outside of the podcast to satisfactorily answer the following questions. Remember to justify your answers with evidence.

Questions:

1. What area(s) of the general external business environment do you believe changed in order to provide an opportunity for a company like AirBnB to form. Is there a changing area of the general environment that you believe will be a threat to their business model in the future?

A binary search tree can be built with a traditional insertion method given a list of integers. Binary search trees (BSTs) are binary trees where the data is ordered such that nodes in the subtree to the left of a given node are smaller than or equal to the node, and the right subtree will contain nodes with values greater than the given node. With a built binary search tree, one can traverse the tree to print each node’s data in each order of traversal or perform some other operations. Further, one can tell by comparing nodes between two given trees whether they relate to each other, by having a reflected symmetric structure (i.e. being mirror images of each other), having identical structure, or not being related at all. In this assignment, you are asked to implement the following features.
Hard-code some paired lists of integers.
Build binary search trees from each list
Print the binary search trees in the three orders discussed in class.
Determine if the two binary search trees are identical, mirrors of each other, or neither
Remove a number in each tree at random and compare the tree pair again

Further, since the methods of the binary search tree class have been presented with recursive function calls, it is now up to you to implement these recursive functions with iterative loops.
NO recursion with the methods. It needs to be done iteratively.

Class BinarySearchTree:
   __root = None

   Def __init__(self):
       Self.__root = None

   Def preorder(self, root):
       # add code here to visit tree in preorder traversal

   Def inorder(self, root):
       # add code here to visit tree in inorder traversal

   Def postorder(self, root):
       # add code here to visit tree in postorder traversal

   Def insert(self, root, data):
       # add code here to insert a node

   Def remove(self, root, data):
       # add code here to remove a node

   Def search(self, root, data):
       # add code here to search for a datum in the tree

   Def get_max(self, root)
       # add code here to find max node of this subtree
  
   Def get_min(self, root):
       # add code here to find min node of this subtree

Class Node:
   __data = None
   __leftchild = None
   __rightchild = None

   Def __init__(self):
       Self.__data = None
       Self.__leftchild = None
       Self.__rightchild = None

Class TreeChecker:
  
   Def is_mirror(self, t1, t2):
       # add code here to check if the input tree pair are mirrors of each other.
# Return if true or false

   Def is_same(self, t1, t2):
       # add code here to check if the two trees are identical. Return if true or false

1. How is a brick veneer wall built? What are the correct steps in this process?

2. Why do we need to use an SW brick for an exterior wall in New England? And what type of mortar should we use?

A engine part is built and shipped from a factory. The manager needs to estimate true proportion of parts (p) in the shipment that are mildly defective before the shipment goes out. He takes a sample of n=400n=400 parts and finds that 5% are mildly defective. He has 80% confidence that p lies in a confidence interval (a,b). What is the interval (a,b)?

A newly built casino is introducing a new gamble. Since this game is extremely new, the casino is offering a free play to everyone (no money or chips needed to gamble) so that all players get a sense of this new game. The game is played with the following rules

There are 3 decks of 20 cards each on the table:
• Deck A contains 20 red cards numbered 1–20.
• Deck B contains 10 red cards numbered 21–30 and 10 blue cards.
• Deck C contains 5 red cards numbered 31–35 and 15 blue cards.
Each of the 3 decks is shuffled, and 1 card is drawn from each deck. These 3 cards are shuffled and put
face down on the table, making a new pile of 3 cards. Let R be the number of red cards among these 3
cards.
a. Compute the expected value and the variance of R.

Parts b–d describe three different ways in which you could learn that the pile of 3 cards formed above
(with 1 card from each of the 3 decks) has 2 red cards. In each case, determine the probability that
the third card in the pile is also red. Note that these three parts are all independent—for example, the
information given in part b does not carry over to parts c or d.

b. The 3 cards in the new pile are turned over one at a time. The first card is the red 32, and the
second card is the red 5. What is the probability that the third card in the pile is also red?
c. The 3 cards in the new pile are turned over one at a time, but you only see the color on each card
(not the number). The first two cards flipped over are red. What is the probability that the third
card in the pile is also red?
d. You ask a friend to look at the 3 cards in the pile without showing you the cards. You ask them,
“Are there at least 2 red cards in the pile?” They confirm that yes, there are at least 2 reds in the
pile. What is the probability that all 3 cards are red?

Several geothermal power plants are in operation in the united states and more are being built since the heat source of a geothermal plant is hot geothermal water which is “free energy.” An 8-MW geothermal power plant is being considered at a location where geothermal water 160 degrees C is available. Geothermal water is to serve as the heat source for a closed Rankine power cycle with refringent 134a as the working fluid. Specify suitable temperature and pressures for the cycle, and determine the thermal efficiency of the cycle. Justify your selection.

A concentration cell is built based on the following half reactions by using two pieces of gold as electrodes, two Au3+ solutions, 0.101 M and 0.423 M, and all other materials needed for a galvanic cell. What will the potential of this cell be when the cathode concentration of Au3+ has changed by 0.035 M at 307 K?

Au3+ + 3 e- → Au Eo = 1.50 V

A concentration cell is built based on the following half reactions by using two pieces of copper as electrodes, two Cu2+ solutions, 0.145 M and 0.405 M, and all other materials needed for a galvanic cell. What will the potential of this cell be when the cathode concentration of Cu2+ has changed by 0.031 M at 279 K? Cu2+ + 2 e- → Cu Eo = 0.341 V