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The decrease in demand would be illustrated by a change from A to C.
<h3>What will be the change?</h3>The demand curve is a downward sloping curve that shows the relationship between price and the quantity demanded. There is a negative relationship between price and quantity demanded.
A change in demand is caused by other factors other than the price of the good. Other factors include a change in income, a change in consumer taste or a change in the price of substitute goods.
When there is a change in demand, the demand curve would shift either to the right or to the left. When demand decreases, the demand curve would shift to the left. When demand increases, the demand curve would shift to the right.
Since, the demand for donuts have decreased, the demand curve would shift to the left. This would be a shift from A to C.
Please find attached the complete question. To learn more about the demand curve, please check: brainly.com/question/25140811
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Answer:
(i) Option (A) is correct.
(ii) Option (A) is correct.
Explanation:
(i) Marginal revenue refers to the change in total revenue obtained from the sale of an extra unit of a commodity. It is calculated by differentiating total revenue with respect to output. It is shown as:
where,
TR = Total revenue
q = output
(ii) In a perfectly competitive market, price is equal to both average revenue and marginal revenue. Since, firms in a competitive market are not required to reduce the price of their product for selling more number of units. Hence, the average revenue remains the same at all the level of output. That's why average revenue in equal to the price under perfect market conditions.
Therefore, every additional unit of an output is sold at a same price, so the marginal revenue obtained from an extra unit is constant and hence, price is equal to the marginal revenue.