Answer:
51 hours
Step-by-step explanation:
$15 x 40 = $600
$15 x 1.50 = $22.5
$22.5 x 11 = $247.5
$600 + $247.5 = $847.5
40 + 11 = 51 hours
Answer:
t ≥ 18
Step-by-step explanation:
He has run 12 miles plus some more miles t. He need to run at least 30 miles
12+t ≥ 30
Subtract 12 from each side
12+t-12 ≥ 30-12
t ≥ 18
Answer:
tSubstitution Property of Equality
Step-by-step explanation:
I took the test and that was the answer
Answer:
48
Step-by-step explanation:
4m means 4xm, and 2m means 2xm
Now, if m = 8, 4m means 4x8, and 2m means 2x8. (Technically, substituting the number in place of the variable m)
4x8 = 32
2x8 = 16
So the equation now is 32+16
Do the math and you get 48
Answer:
The mean is 
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 mean of this normal distribution if the probability of scoring above x = 209 is 0.0228?
This means that when X = 209, Z has a pvalue of 1-0.0228 = 0.9772. So when X = 209, Z = 2.





The mean is 