What type of discontinuity do rational functions have

Rational functions can have two kinds of discontinuities:

A hole appears when the expression would become undefined, and an asymptote is basically the same thing, but it takes the shape of an imaginary line where function will never cross.

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)

7.25

step-by-step explanation:

we know that 7 equals to 7.0. we also know that 1/4=0.25. so we can add the two together and we get 7.25