4 was rolled 2 times
5 also 2 times
6 was rolled 4 times
So the result was greater than three eight times out of 12 rolls.
P=8/12=2/3
In this problem, it will be helpful to know the vertex form of a parabola, which is listed below:

is a constant which helps to determine whether the parabola opens up or down. If
, then the parabola opens downward and if
, the parabola opens upwards
is the vertex of the parabola
By looking at the graph, we can first see that the graph opens downwards, meaning that
. Thus, choices C and D are not valid. Now, let's use the vertex of the parabola to complete the equation.
The vertex of this parabola is (-1, 3), as shown by the graph. When we substitute this into our formula, we get:

The answer is a,
.
Answer:
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Knowing that one mile is 5,280 feet and an hour is 60 minutes:
10 x 5280 = 52800
60 x 1 = 60
52800 / 60 = <u><em>880 feet per minute</em></u>
Hope this helps!