Find the z-scores for the two scores in the given interval.

For the score x =391,

.
For the score x = 486,

Now you want the area (proportion of data) under the normal distribution from z = -1 to z = 0. The Empirical Rule says that 68% of the data falls between z = -1 to z = 1. But the curve is symmetrical around the vertical axis at z = 0, so the answer you want is HALF of 68%.
Answer:$31.25
Step-by-step explanation:
$12.50/30=$.42each*75=$31.25
Answer:
12/10
Step-by-step explanation:
Answer:
36
Step-by-step explanation:
order of operations