Answer:
55.7 in.
Step-by-step explanation:
I assume the figure is a rectangle and a half circle.
The three sides of the rectangle that need to be added toward the perimeter measure 15 in., 10 in., and 15 in.
Then you need the circumference of the half circle which has a 10-inch diameter.
circumference = (pi)d
circumference = 3.14 * 10 in. = 31.4 in.
We only need half the circumference, so we have 31.4 in./2 = 15.7 in.
Now we add the three sides of the rectangle listed above and the circumference of the half circle.
perimeter = 15 in. + 10 in. + 15 in. + 15.7 in.
perimeter = 55.7 in.
Answer:
30
Step-by-step explanation:
Given :
Mean, m = 30 metric tons
Standard deviation (s) = 1.5 metric ton
Sample size, n = 4
Since the impact force in the test model is normally distributed, the shape of the sampling distribution will also be approximately normal with a mean equal to the mean of the test model.
Hence, the sample mean impact force will be equal to the population mean.
Therefore, sample mean = 30 ; population mean = 30
I think the answer is x=2
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Answer:
d.
Step-by-step explanation:
Here is an answer I found on the internet (kudos to investopedia.com)
If a Z-score is 0, it indicates that the data point's score is identical to the mean score.
In other words, it's saying that a z-score of zero has a standard deviation of zero.
