Answer:
the answer is 0.
Step-by-step explanation:
this is correct i just did the problem on khan
504 because when you multiply 9 by 8 and then by 7 (9x8x7) you get 504.
Answer:
D. The distance from the mean to an inflection point
Step-by-step explanation:
We rarely encounter the actual formula for the normal PDF. It is ...

In fact, the inflection points are at x = ±1, where the curve changes from being concave downward to concave upward.
So, one standard deviation is the distance from the mean to an inflection point.