Two negatives make a positive so, -13 - (-49) equals -13 + 49, or 49-13, they are all the same thing, all equal to 36.
Answer:
236.715 ft squared
Step-by-step explanation:
This figure is composed of a rectangle and two semicircles that we can just combine into one circle. Let's find the areas separately.
Circle: the two semicircles will just add up to a circle, so we'll find the area of a circle with radius 15/2 ft.
≈ ft squared
Rectangle: the area of a rectangle is length times width; here the length is 15 and the width is 4, so A = 15 * 4 = 60 ft squared.
Now, we just add these two together:
176.715 + 60 = 236.715 ft squared
Hope this helps!
Answer:
2.57
Step-by-step explanation:
The mean absolute deviation is the mean of the absolute values of the differences from the mean.
<h3>Application</h3>
The mean of the dataset is the sum of values, divided by their number:
mean = (20 +16 +21 +16 +22 +16 +15)/7 = 126/7 = 18
The absolute values of the differences from 18 will have an average of ...
mean(|differences|) = (2 +2 +3 +2 +4 +2 +3)/7 = 18/7
mad(data) ≈ 2.57
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<em>Additional comment</em>
Some calculators have the mad( ) function built-in. See the second attachment, for example.
Answer: 8. 3^4+n^4, 9. 7^3+m^4, and 10. s+2t^3.
Step-by-step explanation: