3. What is the market equilibrium? At the market equilibrium the price of a rose is __ and __ roses per week are bought and sold. A. 9;50 B. 6;100 C. 8;70 D. 7;100

To determine the market equilibrium, we need to find the price at which the quantity demanded equals the quantity supplied. The market equilibrium is the point where the demand curve intersects the supply curve.<br /><br />Let's analyze the given options:<br /><br />A. $\$ 9;50$<br />B. $\$ 6;100$<br />C. $\$ 8;70$<br />D. $\$ 7;100$<br /><br />We need to find the option where the quantity demanded equals the quantity supplied. <br /><br />Option A: At a price of $\$ 9$, the quantity demanded is 50 roses, and the quantity supplied is also 50 roses. This means the market is in equilibrium at this price.<br /><br />Option B: At a price of $\$ 6$, the quantity demanded is 100 roses, but the quantity supplied is not given. Therefore, we cannot determine if the market is in equilibrium at this price.<br /><br />Option C: At a price of $\$ 8$, the quantity demanded is 70 roses, but the quantity supplied is not given. Therefore, we cannot determine if the market is in equilibrium at this price.<br /><br />Option D: At a price of $\$ 7$, the quantity demanded is 100 roses, but the quantity supplied is not given. Therefore, we cannot determine if the market is in equilibrium at this price.<br /><br />Based on the analysis, the correct answer is option A: $\$ 9;50$. At a price of $\$ 9$, the quantity demanded equals the quantity supplied, indicating that the market is in equilibrium.