20
If you see 1/10 of it means part of it and the answer will be less.
If you see is 1/10 of it means it is part of and the answer will be more
Answer:
![\frac{45}{2} \ minutes](https://tex.z-dn.net/?f=%5Cfrac%7B45%7D%7B2%7D%20%5C%20minutes)
Step-by-step explanation:
Given:
Sam can mow a lawn in 30 minutes.
Rocky can mow the same lawn in 90 minutes.
Question asked:
How long does it take for both Sam and Rocky to mow the lawn if they are working together?
Solution:
By unitary method:
<u>For Sam</u>
Sam can mow in 30 minutes = 1 lawn
Sam can mow in 1 minute = ![\frac{1}{30}\ lawn](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B30%7D%5C%20lawn)
<u>For Rocky</u>
Rocky can mow in 90 minutes = 1 lawn
Rocky can mow in 1 minutes = ![\frac{1}{90} \ lawn](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B90%7D%20%5C%20lawn)
In a case of working together:
In 1 minute, both will mow =
+
= ![\frac{3+1}{90} = \frac{4}{90} \ lawn](https://tex.z-dn.net/?f=%5Cfrac%7B3%2B1%7D%7B90%7D%20%3D%20%5Cfrac%7B4%7D%7B90%7D%20%5C%20lawn)
To mow
together, it takes = 1 minute
So, to mow 1 lawn together, it takes = ![\frac{1}{\frac{4}{90} } =\frac{90}{4} =\frac{45}{2} \ minutes](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B%5Cfrac%7B4%7D%7B90%7D%20%7D%20%3D%5Cfrac%7B90%7D%7B4%7D%20%3D%5Cfrac%7B45%7D%7B2%7D%20%5C%20minutes)
Thus, both Sam and Rocky will mow the lawn together in
The correct option regarding the data-sets represented by the box and whisker plots is:
B. The distribution for town A is positively skewed, but the distribution for town B is symmetric.
<h3>What does a box-and-whisker plot shows?</h3>
A box and whisker plot shows three things:
- The 25th percentile, which is the median of the bottom 50%.
- The median, which splits the entire data-set into two halfs, the bottom 50% and the upper 50%.
- The 75th percentile, which is the median of the upper 50%.
For data-set A, we have that:
- The 25th percentile is of 15.
- The 75th percentile is of 30.
Since 30 - 20 > 20 - 15, the distribution is positively skewed.
For data-set B, we have that:
- The 25th percentile is of 20.
- The 75th percentile is of 40.
Since 40 - 30 = 30 - 20, the distribution is symmetric.
Hence the correct option is:
B. The distribution for town A is positively skewed, but the distribution for town B is symmetric.
More can be learned about box and whisker plots at brainly.com/question/27721471
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Answer:
$31.50
Step-by-step explanation:
If you divide $126 by 4, since there is $126 and he wants to divide it <u>equally </u>between his 4 children. If you divide that into a calculator, you'll get $31.5 or $31.50.