The marginal revenue is $0.5 which is being earned if the company sells one more pencil.
<h3>What is total revenue?</h3>
Total revenue is the amount being obtained by the firm after selling the goods and services in the market.
Given values:
Quantity sold: 10,000 units
Marginal quantity: 10,001 units
Equilibrium price: $0.50
Computation of marginal revenue earned:

Therefore, when the company sells one more pencil then it earned a marginal revenue of $0.50.
Learn more about the marginal revenue in the related link:
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Caroline will most likely be performing the prescriptive role of marketing research. Prescriptive analytics are known for processes data from their findings and using it to better suit the company in marketing tactics. Then they are able to present it to their team and in this situation, know which items are top sellers and which aren't. Caroline will use this data to determine what customers are attracted to, what they buy and how she can bring in more revenue to the jewelry store she manages.
The expected return on this portfolio will be given by:
E[P]=Rf+(E[Rm]-Rf)β
Where:
Rf=Risk Free interest rate
Rm=Return on the market portfolio
β= Market Beta
The return on our portfolio will be:
E[p]=0.043+(0.128-0.043)0.013
=0.043+0.085*0.013
=0.044105
=4.4105%