Business Data Networks and Security Eleventh Edition

(If you read the box "Expressing Power Ratios in Decibels") A) If you are told that a signal has attenuated by 20dB, about how much has it attenuated? b) What would you say about attentuation if you were told that a signal has attenuated by 19dB? You must approximate. C) What would you say about attenuation if you were told that a signal has attenuated by 7 dB?