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.
Answer:
6 yards = 18 feet
16.49/18=$0.92 per fleece
15.40/16=$0.96 per fleece
Crafter's warehouse is better the price is less per feet of fleece
Step-by-step explanation:
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4 would be your answer hope I helped :)