Tìm ma trận của các hệ véctơ sau trênP3(t) a)a= 2−t+t2+ 2t3,b= 2t+t2−t3,c= 1 + 2t−t2−t3,d= 1−t2+t3

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).

Out of $20$ creepy-crawly creatures in a room, $80\%$ are flies and $20\%$ are spiders. if $s\%$ of the total legs belong to spiders, what is $s$?

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract