40,561÷ 47= 863
Hoped this helped.
~Bob Ross®
The mean of this test will be 57.
<h3>What is Standard Deviation and Mean?</h3>
A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean.
The mean can be used to get an overall idea, or picture, of the data set.
Let Mean be 'm'
and standard deviation= 
So, m-2
=49
and, m +
=61
Solving the above two equation we get

Now, m= 61-
= 61-4
= 57
So , the mean of this test will be =57
Learn more about mean and standard deviation here:
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14.9 is rounded to 15 or if you are going by tens then it is 20
Step-by-step explanation:
i want to say US metric system for a and divide by 4 and replace feet with inches to create the model
Answer:im not sure i wish i can help but goodluck
Step-by-step explanation: