Ahmed is riding the elevator in a building. The building has floors above and below ground level. Ahmed uses the expression belo
w to describe his movement.
6 + (negative 8)
Which statement could describe Ahmed’s movement?
6 + (negative 8)
Which statement could describe Ahmed’s movement?
2 answers:
Answer:
As the Options are not given
6 + (-8)
It means Ahmed is on the Sixth floor, above the ground floor and then goes 8 floor Downwards which is 2 level below the ground floor.
The Answer in form of numbers is = -2
Because when we add a positive integer and a negative integer , we just subtract smaller integer from larger integer , and keep that sign before the result which the larger number bears.
6 + (-8)=
8 is larger integer which bears negative sign.
One integer is positive and another one is negative,
8 -6= 2
So, 6 + (-8) = -2 →→ 2 level below the ground level
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Answer:
0.3413 = 34.13% probability that the crew member earns between $20.50 and $24.00 per hour
Step-by-step explanation:
Problems of normal distributions 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.
A recent study of the hourly wages of maintenance crew members for major airlines showed that the mean hourly salary was $20.50, with a standard deviation of $3.50.
This means that
a. Between $20.50 and $24.00 per hour
This is the pvalue of Z when X = 24 subtracted by the pvalue of Z when X = 20.5. So
X = 24
has a pvalue of 0.8413
X = 20.5
has a pvalue of 0.5
0.8413 - 0.5 = 0.3413
0.3413 = 34.13% probability that the crew member earns between $20.50 and $24.00 per hour