A researcher was interested in studying the phenomenon known as social distance, the reluctance of people to associate with members of different ethnic and racial groups. She designed an experiment in which students enrolled in a lecture course were asked to choose a discussion group (all meeting at the same time in the same building) based only on the ethnic–racial stereotype associated with the names of the teaching assistant:

Based on the enrollments, use the one-way chi-square to test the null hypothesis that the ethnic–racial name made no difference in students’ selection of a discussion group. State your null and alternative hypothesis and show your work step by step. Make sure interpret your finding (Use .01 significance level).

Consider the following clauses in a knowledge base:

1. A v ~B
2. ~W v B
3. ~A
4. W v B v M

Using this knowledge-base of clauses,

1. Show by a resolution-refutation proof that proposition M is true.
2. Show by resolution inference and the direct proof method that the proposition M is true.

EXPLAIN STEP PLEASE

Depreciation Methods

Gruman Company purchased a machine for $220,000 on January 2, 2016. It made the following estimates:

In 2016, Gruman uses the machine for 1,800 hours and produces 44,000 units. In 2017, Gruman uses the machine for 1,500 hours and produces 35,000 units. If required, round your final answers to the nearest dollar.

Required:

Compute the depreciation for 2016 and 2017 under each of the following methods:

Straight-line method

Sum-of-the-years'-digits method

Double-declining-balance method

Activity method based on hours worked

Activity method based on units of output

For each method, what is the book value of the machine at the end of 2016? At the end of 2017?

Straight-line method

Sum-of-the-years'-digits method

Double-declining-balance method

Activity method based on hours worked

Activity method based on units of output

If Gruman used a service life of 8 years or 15,000 hours and a residual value of $10,000, what would be the effect on the following under the straight-line, sum-of-the-years'-digits, and double-declining-balance depreciation methods?

Depreciation expense

Straight-line method

Sum-of-the-years'-digits method

Double-declining-balance method

Book value

Straight-line method

Sum-of-the-years'-digits method

Double-declining-balance method

Depreciation Methods Gruman Company purchased a machine for $198,000 on January 2, 2016. It made the following estimates: Service life 5 years or 10,000 hours Production 180,000 units Residual value $ 18,000 In 2016, Gruman uses the machine for 2,000 hours and produces 40,000 units. In 2017, Gruman uses the machine for 1,400 hours and produces 32,000 units. If required, round your final answers to the nearest dollar.

Required: Compute the depreciation for 2016 and 2017 under each of the following methods:

Straight-line method 2016 $ 2017 $

Sum-of-the-years'-digits method 2016 $ 2017 $

Double-declining-balance method 2016 $ 2017 $

Activity method based on hours worked 2016 $ 2017 $

Activity method based on units of output 2016 $ 2017 $

For each method, what is the book value of the machine at the end of 2016? At the end of 2017? Straight-line method 2016 $ 2017 $ Sum-of-the-years'-digits method 2016 $ 2017 $ Double-declining-balance method 2016 $ 2017 $ Activity method based on hours worked 2016 $ 2017 $ Activity method based on units of output 2016 $ 2017 $ If Gruman used a service life of 8 years or 15,000 hours and a residual value of $9,000 , what would be the effect on the following under the straight-line, sum-of-the-years'-digits, and double-declining-balance depreciation methods? Depreciation expense Straight-line method 2016 $ 2017 $ Sum-of-the-years'-digits method 2016 $ 2017 $ Double-declining-balance method 2016 $ 2017 $ Book value Straight-line method 2016 $ 2017 $ Sum-of-the-years'-digits method 2016 $ 2017 $ Double-declining-balance method 2016 $ 2017 $

Depreciation Methods

Gruman Company purchased a machine for $198,000 on January 2, 2016. It made the following estimates:

In 2016, Gruman uses the machine for 2,000 hours and produces 40,000 units. In 2017, Gruman uses the machine for 1,400 hours and produces 32,000 units. If required, round your final answers to the nearest dollar.

Required:

Compute the depreciation for 2016 and 2017 under each of the following methods:

Straight-line method

Sum-of-the-years'-digits method

Double-declining-balance method

Activity method based on hours worked

Activity method based on units of output

For each method, what is the book value of the machine at the end of 2016? At the end of 2017?

Straight-line method

Sum-of-the-years'-digits method

Double-declining-balance method

Activity method based on hours worked

Activity method based on units of output

If Gruman used a service life of 8 years or 15,000 hours and a residual value of $9,000 , what would be the effect on the following under the straight-line, sum-of-the-years'-digits, and double-declining-balance depreciation methods?

Depreciation expense

Straight-line method

Sum-of-the-years'-digits method

Double-declining-balance method

Book value

Straight-line method

Sum-of-the-years'-digits method

Double-declining-balance method

Gruman Company purchased a machine for $198,000 on January 2, 2016. It made the following estimates:

In 2016, Gruman uses the machine for 2,000 hours and produces 40,000 units. In 2017, Gruman uses the machine for 1,200 hours and produces 30,000 units. If required, round your final answers to the nearest dollar.

1. Compute the depreciation for 2016 and 2017 under each of the following methods:

1. Straight-line method

   2016	$
   2017	$

2. Sum-of-the-years'-digits method

   2016	$
   2017	$

3. Double-declining-balance method

   2016	$
   2017	$

4. Activity method based on hours worked

   2016	$
   2017	$

5. Activity method based on units of output

   2016	$
   2017	$

2. For each method, what is the book value of the machine at the end of 2016? At the end of 2017?

1. Straight-line method

   2016	$
   2017	$

2. Sum-of-the-years'-digits method

   2016	$
   2017	$

3. Double-declining-balance method

   2016	$
   2017	$

4. Activity method based on hours worked

   2016	$
   2017	$

5. Activity method based on units of output

   2016	$
   2017	$

3. If Gruman used a service life of 8 years or 15,000 hours and a residual value of $9,000 , what would be the effect on the following under the straight-line, sum-of-the-years'-digits, and double-declining-balance depreciation methods?

Depreciation expense

1. Straight-line method

   2016	$
   2017	$

2. Sum-of-the-years'-digits method

   2016	$
   2017	$

3. Double-declining-balance method

   2016	$
   2017	$

Book value

1. Straight-line method

   2016	$
   2017	$

2. Sum-of-the-years'-digits method

   2016	$
   2017	$

3. Double-declining-balance method

   2016	$
   2017	$

Lab Reaction Rate and order of a Chemical Reaction

H₃AsO₃ (aq) + I₃^- (aq) + H₂O (l) → HAsO₄^2- (aq) + 3 I^- (aq) + 4H⁺ (aq)

The data has been collected and pre-lab completed. Need help with the results.

Results

            Laboratory temperature: 25°C

DATA TABLE 1:

DATA TABLE 2:

Questions

- Calculate Δ[IO₃^-] = (1/3)[H₃AsO₃]₀ and record in Data Table 2. (Show calculation)

- Calculate the rates and record in Data Table 2 (Show calculations):

Rate=∆[IO3-]∆t

- Obtain the reaction orders with respect to IO₃^-, I^-, and H⁺ by comparing the rates as described in the lab discussion. Show the rates you are comparing.

- Write the rate law for this reaction with the correct values for a, b, and c.

- Calculate the rate constant, k, for Experiments 1, 2, 3, and 4, using the above rate law and the rates and initial concentrations calculated in Data Table 1. (Show calculations)

Experiment 1:

Experiment 2:

Experiment 3:

Experiment 4:

- How does the calculated value for k compare for the first four experiments, all at 25°C?

2) Calculate the rate constant, k, at the higher temperatures used in Experiment 5 and 6. Remember that you used the same initial concentrations as in Experiment 1. (Show calculations)

Experiment 5:_______

Experiment 6:_______

How does k change as the temperature increases?

Explain why the value for k at higher temperatures is different from the experiments at the lower temperature.

a) Identify the most important source(s) of market power in the following markets and briefly explain your answers:

i. Small town bars with liquor licenses

ii. Apple iPad

iii. Electronic commerce (Amazon)

iv. Brand-name prescription drugs

v. Netflix

b) Calculate the Lerner Index for the following profit maximizing firms:

i. Netflix: price = 10, marginal cost = 4

ii. Shell gasoline: elasticity = 0.6

c) Provide an example cross price elasticity for the following products and briefly justify your answer:

i. The price of Apple iPhone X and the quantity of Samsung Galaxy S10

ii. The price of BP gasoline and the quantity of Ford Expedition SUV’s

iii. The price of Starbuck’s latte’s and the quantity of Nike shoes

Treatment of a polypeptide with Tris-(2-carboxyethyl)-phosphine hydrochloride (TCEP) yields two peptides:

1. I-Q-K-H-C-R-C-A-K-M-V-S

2. F-C-R-L-K-D-C-K-N-D

Treatment of the intact polypeptide with Trypsin yields fragments with the following amino acid composition:
(Ser, Met, Val) (Lys, Gln, Ile) (Phe, Ala, Cys2, Arg, Lys) (Asp, Asn) (Leu, Lys)
(Lys, His, Asp, Cys2, Arg)

a) The intact (untouched) polypeptide is labeled with 1-Fluoro-2,4-dinitrobenzene (FDNB) labeling, followed by acid hydrolysis. What will be observed?

b) Name and briefly describe a method which may determine if the intact polypeptide was a monomer or a dimer

Horseshoe bats (genus Rhinolophus) emit sounds from their nostrils, then listen to the frequency of the sound reflected from their prey to determine the prey's speed. (The "horseshoe" that gives the bat its name is a depression around the nostrils that acts like a focusing mirror, so that the bat emits sound in a narrow beam like a flashlight.) A Rhinolophus flying at speed v bat emits sound of frequency f bat; the sound it hears reflected from an insect flying toward it has a higher frequency f refl.

If the bat emits a sound at a frequency of 80.9 kHz and hears it reflected at a frequency of 83.9 kHz while traveling at a speed of 3.8 m/s , calculate the speed of the insect.

Use 344 m/s for the speed of sound in air. Express your answer using two significant figures.