Answer:
2.7 years
Step-by-step explanation:
When equal value is added or subtracted from each data item, the mean changes by such a value. However, the standard deviation does not change. The standard deviation measures how far the data items are from the mean. Because the mean has been changed by equal amount as the data items, the average "distance" of the data item from the mean does not change.
Of note is that the standard deviation would change if each item was multiplied by the same factor. In that case, the standard deviation would be multiplied by the same factor as well as the mean.
Each birdhouse uses 12 sq ft of wood.
He has enough to build 10 birdhouses, so he has 120 sq ft of wood.
The function has an input of the number of birdhouses, b, and has an output of the amount of wood needed, W. b is the input or the domain, and W is the output or the range. The domain is 0 to 10. The range is 0 to 120.
Answer: B. D: 0 ≤ b ≤ 10 R: 0 ≤ W(b) ≤ 120
Enjoy! Hope this helped you! :)
Answer:
B
Step-by-step explanation:
Since the ratio is 2:220 we can simplify this into 1:110 since the questions is asking about 12 inches, we multiply each side by 12 which gives us a ratio of 12:1320
9 inches is the longest length of boards he can cut
