ANSWER
EXPLANATION
The given expression is
We factor to get,
This implies that,
We factor further to obtain,
or
EXPLANATION
The given expression is
We factor to get,
This implies that,
We factor further to obtain,
or
What is the total cost of 1.2 Cubic yards of soil if it sells for $24 per cubic yard?
2 answers:
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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%.
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%.