The formula db=20logS-26 approximately describes the relationship between of a sound in micropascals S and its reading on the decibel scale

The formula db=20logS-26 approximately describes the relationship between of a sound in micropascals S and its reading on the decibel scale DB. if a bird singing produces a sound reading of about 400 uPa, and a jumbo jet produces a reading of 100 Pa, use the formula to convert these to their corresponding decibel values