Answer:
yw(y - w)
Step-by-step explanation:

Answer:
12 miles
Step-by-step explanation:
19 - 4 = 15
15/1.25 = 12
Answer:
a) The mean is 
b) The standard deviation is 
Step-by-step explanation:
Normal Probability Distribution:
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.
The probability a student selected at random takes at least 55.50 minutes to complete the examination equals 0.6915.
This means that when X = 55.5, Z has a pvalue of 1 - 0.6915 = 0.3085. This means that when 
So




The probability a student selected at random takes no more than 71.52 minutes to complete the examination equals 0.8997.
This means that when X = 71.52, Z has a pvalue of 0.8997. This means that when 
So




Since we also have that 





Question
The mean is 
The standard deviation is 
If all three were the same, then each one would be (279/3) or 93. The integers would be 93, 93, and 93.
Great ! Just take 1 away from the first one, and stick it onto the last one. Now you have 92, 93, 94, and the sum is still the same 279.
Answer:
i think its cancellation the others don't make sense.
Step-by-step explanation: