option A is correct answer friend
Keep in mind that, the directrix is "p" distance units away from the vertex, and the focus point is also "p" distance units from the vertex but in the opposite direction, so in short the vertex is half-way between both of them.
in this case the vertex is at the origin, and the directrix 5 units above it, so that means the parabola is vertical and opening downwards, like the one in the picture below, and the focus point is 5 units the other way.
The amount of passwords you can guess are 4,569,760.
How this is found is by multiplying the amount of numbers in the alphabet by itself 4 times, then multiplying by the amount of 1 digit numbers there are, so multiply by 10, it is ten because you can have the number as 1 2 3 4 5 6 7 8 9 or 0, and then the number you get is your answer. Hope this helped! ^_^
A. 7x(2x+5) that is the answer
Answer:

Step-by-step explanation:
we know that'
The box displays the diagonal measurement of a tv.
so
Applying the Pythagoras Theorem
Let
d -----> the diagonal of TV

substitute the given values



Round to the nearest whole number
