Final answer:
To determine the power delivered by a 40 V voltage source, we need to find the current flowing through the circuit.
Step-by-step explanation:
The power delivered by a voltage source can be determined using the formula P = IV, where P is the power, I is the current, and V is the voltage.
In this case, the voltage of the source is 40 V. Since the current is not given, we need to find the current flowing through the circuit to calculate the power.
If you can provide more information about the circuit and its components, I can help you determine the current and calculate the power delivered by the 40 V voltage source.