Element X decays radioactively with a half life of 14 minutes. If there are 920 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to
decay to 10 grams?
y = a(.5)

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).

Which triangle congruence postulate or theorem justifies my claim that the steps i made using construction paper and scissors produce an isosceles triangle? was it sss, sas, asa, aas, or hl?

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)