Explanation: When there is an impedance mismatch between a transmitter and an antenna, some of the power sent towards the antenna is reflected back towards the transmitter. The power that is actually radiated into space by the antenna is the difference between the forward power supplied by the transmitter and the reflected power. In this scenario: * Forward power from the transmitter = 30 watts * Reflected power = 5 watts Therefore, the power actually radiated is calculated as: Radiated Power = Forward Power - Reflected Power Radiated Power = 30 watts - 5 watts = 25 watts. * **A) 35 watts** is incorrect because it adds the reflected power, which is not radiated. * **B) 30 watts** is incorrect because it ignores the reflected power; not all power is radiated when there's a mismatch. * **D) 20 watts** is an incorrect calculation.