Answer:
21.77% probability that a randomly selected teacher earns more than $525 a week
Step-by-step explanation:
Problems of normally distributed samples are 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:

What is the probability that a randomly selected teacher earns more than $525 a week?
This is 1 subtracted by the pvalue of Z when X = 525. So



has a pvalue of 0.7823
1 - 0.7823 = 0.2177
21.77% probability that a randomly selected teacher earns more than $525 a week
Step-by-step explanation:

Answer:
It's either B or D
(Not Sure Which One)
Step-by-step explanation:
F(x)=X to the power of 3
G(x)=-5x to the power of 3
Flips Over X Axis
(Because X is Negitive)
Answer:
b<-7 or b>-1
Step-by-step explanation:
explanation: -6b>42 turns into -42>6b then divide by 6 on both sides and you get -7>b
for the other inequality, you take 4b+6>2 and then subtract6 from both sides, from there you will get 4b>-4 and that will be b>-1
3x + 2y = 7
y = x - 4
3x + 2(x - 4) = 7
3x + 2x - 8 = 7
5x = 7 + 8
5x = 15
x = 15/5
x = 3
y = x - 4
y = (3) - 4
y = -1
the solution to the set is (3, -1)
hope this helps :)