From one of the documents, Determination of Ka of a weak acid Version Version 42-0151-00-02, they got the answers Data5 Table 3. Determination of Unknown pKa of Unknown Weak Acid: 4.75 Ka of Unknown Weak Acid: 1.76 x 10-5 % error pKa: 0% % Error Ka: 1.67% Can someone show work on how they got this?

Example 3.5: Again let X = Y = R. Define g by g(x) = x2. The graph of this function has the familiar parabolic shape as in Figure 3.1(b). Then for example, g([0, 1]) = [0, 1], g([1, 2]) = [1, 4], g({−1, 1}) = {1}, g−1([0, 1]) = [−1, 1], g−1([1, 2]) = [− √ 2, −1]∪[1, √ 2], g−1([0, ∞)) = R.

*I need help understanding why each example in bold is the answer it is*

*Please explain clearly why the inverse functions have the answer they have because it is not clear to me why*

*Please show all work and step by step solution*

Below is an invoice sent out by MegaCorp.

STEP 1:

Convert the above to 1NF

1. Provide a relation of the above INVOICE, underlining the primary keys.

STEP 2:

Consider the following functional dependencies of the invoice data:

OrderID à OrderDate, CustomerNum, CustomerName, CustomerAddress

ProductID à ProductDescription, ProductFinish, ProductStandardPrice

STEP 3:

Convert your 1NF table to 2NF. (i.e., look only at non-key attributes that are dependent on a single PK)

A relation is in 2NF if it contains no partial functional dependencies.

1. Provide me 2NF relations based on the dependencies above. BE CAREFUL:   I am NOT asking you to do 3NF yet!!

STEP 4:

Now, you’ve realized there are some additional functional dependencies:

CustomerNum à CustomerName, CustomerAddress

Convert your 2NF relations to 3NF based on the dependencies you just received.

Below is an invoice sent out by MegaCorp.

STEP 1:

Convert the above to 1NF

1. Provide a relation of the above INVOICE, underlining the primary keys.

STEP 2:

Consider the following functional dependencies of the invoice data:

OrderID à OrderDate, CustomerNum, CustomerName, CustomerAddress

ProductID à ProductDescription, ProductFinish, ProductStandardPrice

STEP 3:

Convert your 1NF table to 2NF. (i.e., look only at non-key attributes that are dependent on a single PK)

A relation is in 2NF if it contains no partial functional dependencies.

1. Provide me 2NF relations based on the dependencies above. BE CAREFUL:   I am NOT asking you to do 3NF yet!!

STEP 4:

Now, you’ve realized there are some additional functional dependencies:

CustomerNum à CustomerName, CustomerAddress

Convert your 2NF relations to 3NF based on the dependencies you just received.

Question 1: When dropping a product line, the avoidable costs are which of the following:

1.The variable costs plus the direct fixed costs of the line

2.Only the variable costs of the line

3.Only the direct fixed costs of the line

4.The variable costs plus direct fixed costs plus common fixed costs of the line

Question 2: Which of the following will be considered relevant in an incremental analysis decision:

1.Unavoidable fixed cost

2.Opportunity cost

3.Sunk cost

4.Only variable cost can be considered relevant

A company manufactures computer monitors for a cost of $150. After selling thousands of monitors to customers, 100 screens were returned by customers. The company can refurbish (process) the monitors with a cost of $50 per monitor and sell it to customers for $140 per monitor. If the monitors are not refurbished, the company can sell them “as-is” to the Giant Screen Liquidators Company for $80 per monitor.

Required:

Should the company refurbish/process the returned monitors or just sell them “as-is”?

Question 3: In the previous example, when considering the company’s decision whether to refurbish the monitors or not, the cost of producing the monitors is:

1.Relevant

2.Necessarily fixed

3.Necessarily variable

4.Irrelevant

Question 4:

In the decision on the profit maximizing price the fixed costs:

1.Are Relevant Costs

2.Are Irrelevant costs

3.Do not affect net profit

4.Increase with the selling price

Question 5: Assume now the Chinese retail chain from the previous example also requests that the company will change the box in which the contacts are packaged to one that fits the Chinese market. The company estimates that designing the new box will cost $150,000 (a one-time cost) and it will also increase variable costs by $7 per box. Should the company still take the special order?

1.Yes

2.No

Please answer all questions above and briefly explain how you got to that answer. Thank you in advance.

The following information is taken from the records of West End Distributors Inc. for the month ended May 31.

At May 31, 200 units remain unsold. For specific identification purposes, items on hand at May 31 were:

100 units of purchase #1

100 units of purchase #4

The other units were sold on May 31 for $2 each.

Required:

1. Find the ACF and PACF and plot the ACF ρk for k = 0, 1, 2, 3, 4, 5 for the following model where the wt is a Gaussian white noise process.

Zt = −0.5Zt−1 + wt

A recipe calls for 1 1/5 cups of flour for every 1/2 teaspoon of salt. Suppose you put 4 cups of flour in a mixing bowl. How much salt should you add?

Which of the following illustrates Lead Time?

1- April 1st - Purchase request approved / May 31st - Product delivered

2- April 1st - Purchase request approved / April 28th – Purchase agreement signed

3- April 28th - Purchase agreement signed / June 1st – Estimated delivery date

4- Mark for follow up

Question 11 of 60.

What documents are examined for three-way matching?

1- Purchase order / Receiving report / Goods Received Note (GRN)

2- Purchase order / Scope of Works (SOW) / Goods Received Note (GRN)

3- Supplier’s invoice / Purchase order / Service Completion Report (SRN)

4- Supplier’s invoice / Purchase order / Goods Received Note (GRN)

Question 12 of 60.

How often is it recommended to review available suppliers for Framework/Preferred Master Supplier Agreements to ensure cost-effectiveness

1- Every month

2- Every 6 months

3- Every 1 year

4- Every 5 years

Question 13 of 60.

Bidders agree to pay 10% of the estimated contract amount for failing to enter into the contract. Where in a contract would you find this specification?

1- Penalty clause

2- Bid guarantee

3- Change order

4- Code of Ethics

Question 14 of 60.

How should an organization’s procurement manager respond to a request for purchasing prescribed pharmaceutical items?

1- Request management have a special place to store such pharmaceutical items

2- Explain that the request is denied as the item may lead to corruption activities

3- Ask the requestor to check if such procurement may need special donor/organizational approval

4- Mark for follow up

Question 15 of 60.

A supplier estimates it will take a minimum of 60 days from the time the contract is signed to fill the order. This is an example of which type of time?

1- Lead Time

2- Time to Award

3- Supplier Delivery Time

Question 16 of 60.

Why is it important to publicly announce the tender?

1- Demonstrate transparency and attract more competitive potential bidders

2- Inform communities about ongoing procurement activities

3- Encourage suppliers to read newspapers and access the internet