Tom Skinner has $45,000 invested in a stock with a beta of 0.8 and another $55,000 invested in a stock with a beta of 1.4. These are the only two investments in his portfolio. What is his portfolio's beta?

The porfolio beta is 1.13

Explanation:

The computation of the portfolio beta is shown below:

= Weight × beta + weight × beta

= ($45,000 ÷ ($45,000 + $55,000) × 0.8 + ($55,000 ÷ ($45,000 + $55,000) × 1.4

= 0.45 × 0.8 + 0.55 × 1.4

= 1.13

Hence, the porfolio beta is 1.13

We simply applied the above formula so that the correct value could come

And, the same is to be considered

c is the correct answer.

answer: marginal utility of the fourth brownie is 0.

explanation: marginal utility is the addtional utility gained from the consumption of one more unit of a good. it is given by,

so, marginal utility at the 4th unit will be given by

since, the values are not given here, you can simply find marginal utility at fourth unit by subtracting total utility at 3rd unit from total utility at 4th unit.