A student is trying to listen to a sound source from a radio placed 100m away with a power output of 80W. Using the formula for intensity of a spherical sound wave, I=P/4πr^2, the intensity at 100m is calculated to be 6.37 *10^(-4) W/m^2. Converting this intensity to decibels gives a value of 88 dB. Therefore, the intensity and sound level at a distance of 100m from an 80W radio is 6.37 *10^(-4) W/m^2 and 88 dB, respectively.