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Zielflug [23.3K]
2 years ago
15

What happens to warm air when it cools?

Mathematics
2 answers:
Temka [501]2 years ago
7 0

Answer:

b

Step-by-step explanation:

hj

timofeeve [1]2 years ago
4 0

Answer:Its B,dude

Step-by-step explanation:

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And model links of 12 cm represents an actual length of 102 feet what is the scale for the model
babymother [125]
If there are 30.48cm in a foot and 12cm represents 102 feet then 12 cm represents 3109cm or 12:3109. Divide both sides by 12 to get the scale and it is: 1:259, the scale is 259.

Hope this helps :)
4 0
4 years ago
Please help with math 30 points
Doss [256]

Your answer is going to be y = l x - 2 l

3 0
3 years ago
To prepare for the town's race, Andrew runs around a rectangular field. The dimensions of the field are 450 feet
Ket [755]

Answer:

46.9 times

Step-by-step explanation:

First, we can calculate how many feet it takes to run around the field. To find the perimeter of a rectangle, we can use the formula

2* length + 2 * width. With the length being 450 and the width being 225 here, we can say that

2*450 + 2 * 225 = 1350 feet

Therefore, Andrew runs 1350 feet each time he runs around the field. Next, we need to figure out how much 1350 feet goes into 12 miles as we want to find how many times Andrew runs around the field to get to 12 miles. This can be represented by

12 miles/1350 feet

One thing that we can do here is multiply the fraction by 1 to keep it the same. Because 1 mile = 5280 feet, we can say that

1 mile/5280 feet = 1 = 5280 feet/1 mile. Therefore, it would be safe to multiply

12 miles/1350 feet by 1 = 5280 feet/1 mile. Note that feet is on the bottom in the first fraction (12 miles/1350 feet) and on the top in the second (5280 feet/1 mile) so they will cancel out. Similarly, miles are on top in the first and bottom in the second. We then have

12 miles/1350 feet * 5280 feet/1 mile =63360/1350 ≈ 46.9

4 0
3 years ago
Students took two parts of a test, each worth 50 points. Part A has a variance of 25, and Part B has a variance of 36. The corre
Leona [35]

Answer:

Following are the solution to the given choices:

Step-by-step explanation:

In point a:

Calculating the variance of the test grade:

\to var(A+B)=var A + var B + 2 cov(A,B)

                       =25+36+2(0.8)\\\\=25+36+1.6\\\\=62.6

In point b:

\to var(A-B)=varA + var B - 2 cov(A,B)

                       =25+36-2(0.8)\\\\=25+36-1.6\\\\=59.4

The relationship between the top 20 students is also slight, so the top 20 students are more university-like than all secondary students.

7 0
3 years ago
What is the average rate of change of f(x)= –8x+20 over the interval [–17,–10].
shutvik [7]

Answer:

Mein Name ist, mein Name ist, ich bin der beste Rapper, den es gibt

Step-by-step explanation:

8 0
3 years ago
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