Which is the directrix of a parabola with equation x^2=8y

Alright so, After rewriting the equation in a standard parabola, you get:

4 x 2 (y-0) =(x - 0)^2

Simplify it to get:

y= 0-p

y= 0-2

When you simplify that, your answer is:

y=-2

There you go folks, just saved you from reading that long paragraph of an answer the other guy has (I don't even think the answer is in there lol, I think he just wanted to help people solve it but still most people come here for answers)

the answer is:

the correct option:

b.

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!