Which statement explains how you could use coordinate geometry to prove that the quadrilateral abcd is a rectangle

How do you multiply a mixed fraction by a regular fraction

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Write the equation in logarithmic form e^x=403.429