What is the value of the expression 3y−zy+5z3y−zy+5z when y = 6 and z = 2?

a.1

b.3

c.4

d.16

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).

What is the size of the matrix resulting from

Look at attachment. has all info needed. need