If f is frequency and d is distance, path attenuation a between isotropic antennas is given by-A-a = 33 + 20 log f + 20 log dB-a = 100 + 33 log f + 33 log dC-D--A-a = 33 + 20 log f + 20 log d

A a = 33 + 20 log f + 20 log d No answer description is available.