Solve for missing variable d=rt, r=57, t=4

Adeposit of 5500 at 6% for 3 years equals

Pls never taught i’m really confused and i rlly need

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels