One species of frog can go to the maximum on the link of 12.9 millimeters. What is the maximum length of this frog species in centimeters

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).

Answer this question only if you know the answer! 30 points and

What is the size of the matrix resulting from