My teacher says this is wrong but I don’t see anything wrong with it. It asking for me to write it in scientific notation which is what I did, I moved the decimal to a number 1-10, then I counted how many times I moved it and that’s what I got for my exponent, can someone please explain why this is wrong?

The answer is 4.9*10^-3 because you are making the number bigger not smaller

Step-by-step explanation:

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)

y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4