Answer:
0.13% of students have scored less than 45 points
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:

About what percent of students have scored less than 45 points?
This is the pvalue of Z when X = 45. So



has a pvalue of 0.0013
0.13% of students have scored less than 45 points
Answer:
87 kilometers
Step-by-step explanation:
perimeter is side a plus side b plus side c.
4+25+29+29=87
Commission is earning a certain percentage of the total sold price.
To figure this out we need to find what is 3% of $120,000
We can do this by multiplying 3% and $120,000
First let's change 3% into a decimal.
3% = 0.03
Now lets multiply.
0.03 x $120,000 = $3,600
So this person earned $3,600 in commission.
Good Luck! :)
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I can’t see your choices, but this equation can be simplified to 5y + 5.
If you add the choices as a comment, I’m happy to help more.