Answer:

Step-by-step explanation:
The general vertex form of parabola is,

where,
(h, k) is the vertex of the parabola.
The given function is,








This is vertex form the given function.
the number of cards in my friends stack is 20 total cards
B. because so what u need to do is.....
8.5÷11= 0.77272... so then you try the other side which is
17÷22= 0.77272... and so your answer will be
B. 8.5/11 = 17/22