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3 years ago

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Explain about E = mc² !!??

Business

1 answer:

vodka [1.7K]3 years ago

5 0

Answer:

E = mc2. It's the world's most famous equation, but what does it really mean? "Energy equals mass times the speed of light squared." On the most basic level, the equation says that energy and mass (matter) are interchangeable; they are different forms of the same thing.

Explanation:

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What is the expected return on an equally weighted portfolio of these three stocks? (Do not round intermediate calculations and

siniylev [52]

Answer:

a. The expected return on the equally weighted portfolio of the three stocks is 16.23%.

b. The variance of the portfolio is 0.020353.

Explanation:

Note: This question is not complete. The complete question is therefore provided before answering the question. See the attached pdf file for the complete question.

a. What is the expected return on an equally weighted portfolio of these three stocks? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)

This can be calculated using the following 2 steps:

Step 1: Calculation of expected returns under each state of the economy

Expected return under a state of the economy is the sum of the multiplication of the percentage invested in each stock and the rate of return of each stock under the state of the economy.

This can be calculated using the following formula:

Expected return under a state of the economy = (Percentage invested in Stock A * Return of Stock A under the state of the economy) + (Percentage invested in Stock B * Return of Stock B under the state of the economy) + (Percentage invested in Stock C * Return of Stock C under the state of the economy) …………… (1)

Since we have an equally weighted portfolio, this implies that percentage invested on each stock can be calculated as follows:

Percentage invested on each stock = 100% / 3 = 33.3333333333333%, or 0.333333333333333

Substituting the relevant values into equation (1), we have:

Expected return under Boom = (0.333333333333333 * 0.09) + (0.333333333333333 * 0.03) + (0.333333333333333 * 0.39) = 0.17

Expected return under Bust = (0.333333333333333 * 0.28) + (0.333333333333333 * 0.34) + (0.333333333333333 * (-0.19)) = 0.143333333333333

Step 2: Calculation of expected return of the portfolio

This can be calculated using the following formula:

Portfolio expected return = (Probability of Boom Occurring * Expected Return under Boom) + (Probability of Bust Occurring * Expected Return under Bust) …………………. (2)

Substituting the relevant values into equation (2), we have::

Portfolio expected return = (0.71 * 0.17) + (0.29 * 0.143333333333333) = 0.162266666666667, or 16.2266666666667%

Rounding to 2 decimal places as required by the question, we have:

Portfolio expected return = 16.23%

Therefore, the expected return on the equally weighted portfolio of the three stocks is 16.23%.

b. What is the variance of a portfolio invested 16 percent each in A and B and 68 percent in C? (Do not round intermediate calculations and round your answer to 6 decimal places, e.g., .161616.)

This can be calculated using the following 3 steps:

Step 1: Calculation of expected returns under each state of the economy

Using equation (1) in part a above, we have:

Expected return under Boom = (16% * 0.09) + (16% * 0.03) + (68% * 0.39) = 0.2844

Expected return under Boom = (16% * 0.28) + (16% * 0.34) + (68% * (-0.19)) = -0.03

Step 2: Calculation of expected return of the portfolio

Using equation (2) in part a above, we have:

Portfolio expected return = (0.71 * 0.2844) + (0.29 *(-0.03)) = 0.193224

Step 3: Calculation of the variance of the portfolio

Variance of the portfolio = (Probability of Boom Occurring * (Expected Return under Boom - Portfolio expected return)^2) + (Probability of Bust Occurring * (Expected Return under Bust - Portfolio expected return)^2) …………………….. (3)

Substituting the relevant values into equation (3), we have:

Variance of the portfolio = (0.71 * (0.2844 - 0.193224)^2) + (0.29 * (-0.03- 0.193224)^2) = 0.020352671424

Rounding to 6 decimal places as required by the question, we have:

Variance of the portfolio = 0.020353

Therefore, the variance of the portfolio is 0.020353.

Download pdf

7 0

2 years ago

Which two of the following skills and abilities are important for a flight attendant?

guapka [62]

Hand-Eye coordination and Customer service are important traits for a flight attendant. Hand-Eye coordination is important because a flight attendant is on a moving vehicle while also moving around. Customer service is also important because a flight attendant helps the passengers within the plane.

6 0

3 years ago

Subjective performance evaluations are subject to several rater errors, which makes objective measures seem a better alternative

Mandarinka [93]

Answer:

A Subjective performance evaluation is more feasible when evaluating jobs that cannot easily be evaluated by numbers, in finding problems such as ethical errors that objective evaluation cannot identify and in identifying the rate of achievement of work goals that cannot be recorded in an objective evaluation.

Explanation:

Though Objective evaluation has been the more favored form of evaluation for valid reasons, there are still situations where subjective performance evaluation does a better job in the workplace.

Some jobs for example, the job of an attorney, cannot easily be objectively evaluated. In this situation, it falls on the employer to evaluate the performance of the employee by using measurements like team play, professionalism and client service.

In objective analysis, some ethical approaches are overlooked and the achievement of the set goal is the major criterion for ratings. This affords employees the opportunity to use unethical means to achieve set targets and the objective performance evaluation skips it, leaving them safe and with high ratings. In subjective performance ratings however, the employer having the power to rate employers, could expose these unethical behaviors faster and actions, taken on them.

In the workplace, certain goals are set in overall goals, as a method to achieving the overall set target. In an objective performance rating, an employee could bypass these and still appear to have achieved the overall goal. An objective evaluation will miss this but a subjective evaluation could pick this out and make rating each employee based on these soft goals and overall goal achievable.

3 0

2 years ago

Lol lol lol get points

Reika [66]

lol lol u givin only 15 points

3 0

2 years ago

Read 2 more answers

Use the following balance sheet and cash flow statement information to answer the questions below. Liquid assets: $10,000; home

Ilya [14]

Answer:

(a) Liquidity ratio for individuals

basic liquidity ratio = cash assets / monthly expenses = $10,000 / $6,000 = 1.67

Depending on the maturity of the investment assets, the liquidity ratio could increase, but since the information is limited, we can only consider liquid assets. E.g. if the investment assets include bonds that mature in a very short term they should be included in this formula, but if they include bonds that mature in x number of years, then they aren't included.

(b) Asset-to-debt ratio :

generally the formula is debt to asset ratio = $175,500 / $330,000 = 0.53

but here we are asked to find asset to debt = $330,000 / $175,500 = 1.88

debt service to income ratio = monthly payments / gross income = ($250 + $2,100) / $9,000 = $2,350 / $9,000 = 0.26

(d) Debt payments-to-disposable income ratio

debt payments to disposable income ratio = monthly payments / disposable income = ($250 + $2,100) / $6,800 = $2,350 / $6,800 = 0.35

4 0

3 years ago