Instruction: Read the problem carefully to understand the scenario. Identify what you need to find (quantity, price, or other). Problem 1: The demand function for a popular smartphone model is given by Qd = 500 - 5P, where Qd is the quantity demanded and P is the price in dollars. Calculate the quantity demanded when the price is $30. Problem 2: A local coffee shop's demand function for its specialty coffee is Qd = 200 - 2P, where Qd is the number of cups sold and P is the price in dollars. Determine the price at which the quantity demanded will be 100 cups of coffee. Problem 3: A streaming service provider has a demand function for its premium plan given by Qd = 150 - P, where Qd is the number of subscribers and P is the monthly price in dollars. Calculate the number of subscribers when the price is $50. Problem 4: The demand for electric vehicles (EVs) is represented by the demand function Qd = 300 - 3P, where Qd is the number of EVs sold and P is the price in thousands of dollars. Calculate the quantity demanded when the price is $40,000. Problem 5: The demand for houses in a city is given by the demand function Qd = 400 - 5P, where Qd is the number of houses sold and P is the price in thousands of dollars. Calculate the price at which the quantity demanded will be 120 houses. Problem 6: The demand function for a major airline's economy-class tickets is given by Qd = 500 - 3P, where Qd is the number of tickets sold, and P is the price in dollars. Calculate the number of tickets sold when the price is $100. Problem 7: A ride-sharing service has a demand function for rides in a city, which is Qd = 300 - 2P, where Qd is the number of rides taken, and P is the price per ride in dollars. Determine the price at which 150 rides will be requested. Problem 8: The demand function for a smart home device is given by Qd = 200 - P, where Qd is the number of devices sold, and P is the price in dollars. Calculate the quantity demanded when the price is $75. Problem 9: A regional airline's demand function for passenger flights is represented by Qd = 400 - 4P, where Qd is the number of passengers, and P is the price of a ticket in hundreds of dollars. Calculate the number of passengers when the ticket price is $30. Problem 10: A local restaurant's demand function for a particular meal is Qd = 150 - 2P, where Qd is the number of meals ordered, and P is the price per meal in dollars. Determine the price at which 80 meals will be ordered. Problem 11 : In the market for electric vehicles (EVs), the demand function is Qd = 500 - 5P, where Qd is the quantity demanded, and P is the price in thousands of dollars. The supply function for EVs is 05 = 200 + 3P. Calculate the quantity supplied when the price is $30,000. Problem 12: In the market for organic produce, the demand function is Qd = 400 - 3P, where Qd is the quantity demanded, and P is the price. The supply function for organic produce is 05 = 100 + 2P. Determine the quantity demanded when the price is $20. Problem 13: The demand for renewable energy in a region is given by the equation Qd = 300 2P, where Qd is the quantity demanded, and P is the price per unit of renewable energy. The supply function for renewable energy is Qs = 150 + P. Calculate the quantity supplied when the price is $40. Problem 14: In the market for apartment rentals, the demand function is Qd = 250 - 4P, where Qd is the number of apartments rented, and P is the monthly rent in hundreds of dollars. The supply function for apartments is Os = 100 + 2P. Determine the quantity demanded when the rent is $1,000 per month. Problem 15: In the market for ride-sharing services, the demand function is Qd = 350 - 3P, where Qd is the number of rides taken, and P is the price per ride in dollars. The supply function for ride-sharing services is Qs = 100 + 4P. Calculate the quantity supplied when the price is $20 per ride. Problem 16: In the market for hotel room rentals, the demand function is Qd = 300 - 2P, where Qd is the number of rooms booked, and P is the price in hundreds of dollars. The supply function for hotel rooms is Os = 100 + 3P. Determine the quantity demanded when the room price is $150. Problem 17: A ride-hailing service has a demand function for rides in a city, which is Qd = 200 - P, where Qd is the number of rides requested, and P is the price per ride in dollars. The supply function for ride-hailing services is GS = 80 + 2P. Calculate the quantity supplied when the price is $25. Problem 18: In the market for solar panels, the demand function is Qd = 150 - P, where Qd is the quantity demanded, and P is the price per panel in thousands of dollars. The supply function for solar panels is Qs = 60 + 2P. Determine the quantity demanded when the price is $15,000. Problem 19: A ride-sharing scooter company has a demand function for scooter rides in a city, which is Qd = 250 - 3P, where Qd is the number of scooter rides taken, and P is the price per ride in dollars. The supply function for scooters is 03 = 80 + 4P. Calculate the quantity supplied when the price is $5. Problem 20: In the market for artisan bread, the demand function is Qd = 200 - 4P, where Cd is the number of loaves purchased, and P is the price per loaf. The supply function for artisan bread is Os = 50 + 2P. Determine the quantity demanded when the price is $7