Algebra 2 ?

5. a construction explosion has an intensity i of 1.25 x 10–4 w/m2. find the loudness of the sound in decibels if w/m2. round to the nearest tenth. (1 point)

81 decibels
161 decibels
82.2 decibels
12.5 decibels

the example question in the textbook is totally different so i'm not sure how to do this. i tried to make the equation and then got confused. an explanation would be great!

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?