Answer:
3x^3 + 3x^2 − 30x − 48
Step-by-step explanation:
3( x + 2 )( x^2 − x − 8 )
= ( 3( x + 2 ))( x^2 + − x + − 8 )
= ( 3( x + 2 ))( x^2 ) + ( 3( x + 2 ))( −x ) + ( 3( x + 2 ))( −8 )
= 3x^3 + 6x^2 − 3x^2 − 6x − 24x − 48
3x^3 + 3x^2 − 30x − 48
Answer: $10.50
Step-by-step explanation:
You would divide 6 into 31.50 to see how much each bag costs. Which equals $5.25. Then you would multiply $5.25 and 2 and the answer is 10.25 :)
2.5 customers/min
.4 min/customer
Answer:
0.45
Step-by-step explanation:
Answer:
There is a 34.15% probability the crew member earns between $20.50 and $24.00 per hour
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:
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) What is the probability the crew member earns between $20.50 and $24.00 per hour?
This is the pvalue of the zscore of X = 24.00 subtracted by the pvalue of the zscore of X = 20.50.
X = 24
has a pvalue of 0.8413.
X = 20.50
has a pvalue of 0.50.
This means that there is a 0.8413 - 0.50 = 0.3413 = 34.15% probability the crew member earns between $20.50 and $24.00 per hour