Juliana and Asha were using a trumpet to test how sound waves travel. Juliana blew a series of notes through the trumpet, while Asha changed her location around the room in between each trial.

Asha used a detector to measure how loudly Juliana was playing the trumpet. Asha put the detector right in front of the trumpet and got a reading of 80 decibels. She then opened the door and want down the hall a short distance, where she got a reading of 50 decibels. How much louder was the trumpet when Asha was standing right next to it than when she was down the hall?

a) 30 times
b) 300 times
c) 100 times
d) 1000 times