Answer:
38.3% of the people taking the test score between 400 and 500
Step-by-step explanation:
When the distribution is normal, we use 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 question, we have that:
What percentage of the people taking the test score between 400 and 500
We have to find the pvalue of Z when X = 500 subtracted by the pvalue of Z when X = 400. So
X = 500
has a pvalue of 0.6915
X = 400
has a pvalue of 0.3085
0.6915 - 0.3085 = 0.383
38.3% of the people taking the test score between 400 and 500
The closed to the answer is C
Answer: in the 4th quadrant
Step-by-step explanation:
it needs to be in y=mx+b (slope form) so it would be
- -y=-1/2x+2
- then divide everything by -1
- which is y=1/2 -2
- b=-2 m=1/2
- if you were to graph it, the line would be in the 4th quadrant
Answer:
(x -3)(x + 6)
Step-by-step explanation:
x^2+ 3x – 18
As you know
- 18 = -3 * 6
3 = -3 + 6
So
x^2+ 3x – 18
= (x -3)(x + 6)
Answer:
60
Step-by-step explanation:
10% = ?
54= ?
100%-10%=90%
54=90%
54/9=6
6=10%
6*100%=60