6k^2m - 12k^3m^2 + 9m^3 / 2km^2
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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).

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?