Answer:
B. 55
Step-by-step explanation:
Problems of normally distributed samples can be solved using the z-score formula.
In a set with mean and standard deviation , the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:
What raw score is represented be a z-score of 1.00?
This is X when Z = 1. So:
So the correct answer is:
B. 55
Answer:
hope this helps
Step-by-step explanation:
Answer:
(4, 2)
Step-by-step explanation:
the midpoint of points (x1, y1) and (x2, y2) is (,)
plug in points (-2, -4) and (10, 8) to get ((10+(-2))/2), (8+(-4))/2) = (4, 2)
Answer: the cost of each pendant is $2.1
Step-by-step explanation:
Let x represent the cost of each pendant.
Amy made 3 identical necklaces, each having beads and a pendant. It means that the cost of the pendant used is $3x. The total cost of the beads and pendants for all 3 necklaces was $13.20. If the beads cost a total of $6.90, then the equation would be written as
6.90 + 3x = 13.20
3x = 13.20 - 6.90
3x = 6.3
x = 6.3/3
x = 2.1