Whats's the internal heat gain in kW from a heat factory with 20kW of surface-mounted lighting, 10kW of running electric motors, and 10 people doing light benchwork? A.23.8 B. 20.0 C.20.8 D.17.8

We can infer that star y is closer but other factors must be considered include the heat of the star, the mass, and the brightness of the star. even though star x seems dimmer it may just be less bright or contains less heat.