Answer:
B
Step-by-step explanation:
328= 82 x 4
348/4 = 87
87 - 82 = 5
Answer:
± 4i
Step-by-step explanation:
=
= × ×
= 4i → [ = i ]
Answer:
30 seconds
Step-by-step explanation:
10x10=100 3x10=30
Answer:
P(X < 80) = 0.89435.
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:
P(X < 80)
This is the pvalue of Z when X = 80. So
has a pvalue of 0.89435.
So
P(X < 80) = 0.89435.