The decibel scale is used to measure the perceived loudness of a sound.
a. true
b. false

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k

Observations show that interstellar clouds can have almost any shape and

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion