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stira [4]
2 years ago
5

A random sample of 5 paintings was studied in a museum. Please consult the data chart above to answer the following question. Wh

ich of the columns represent categorical data? A. Columns A and D O B. Columns B and C O C. Columns A and B D. Columns C and D​

Mathematics
1 answer:
katovenus [111]2 years ago
3 0

Answer:

Solution

(a) Quantitative Variables: Land Area, Population, Energy, Rural, Military, Health, HIV, Internet,

Birth Rate, Elderly Population, Life Expectancy, CO2, Cell, Electricity, GDP

Categorical Variables: Developed

Identification Columns: Country, Code

(b) Any answers which contain two questions about individual variables are acceptable. For example, a question could be: Which country has the highest percentage of government expenditures

directed toward the military?

(c) Any answers which contain two questions about relationships between any two (or more) variables is acceptable. For example, a questions could be: How does the percentage of government

expenditures dire

Step-by-step explanation:

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Find the length of the curve. R(t) = 7t, 3 cos(t), 3 sin(t) , −2 ≤ t ≤ 2
Leviafan [203]

we are given

r(t)=(7t,3cos(t),3sin(t))

we can find x , y and z

x=7t,y=3cos(t),z=3sin(t))

now, we can use arc length formula

L=\int\limits^a_b {\sqrt{(x')^2+(y')^2+(z')^2} } \, dt

now, we can find derivative

x'=7,y'=-3sin(t),z'=3cos(t))

now, we can plug values

and we get

L=\int _{-2}^2\sqrt{7^2+\left(-3\sin \left(t\right)\right)^2+\left(3\cos \left(t\right)\right)^2}dt

L=\int _{-2}^2\sqrt{7^2+9}dt

=\sqrt{58}\cdot \:2-\left(-2\sqrt{58}\right)

L=4\sqrt{58}...........Answer


8 0
3 years ago
Help!! Find the value of x
Romashka [77]

Answer:

x = 51

Step-by-step explanation:

The sum of internal angles for this rectangle is 360

x + 81 + 124 + 104 = 360 add like terms

x + 309 = 360 subtract 309 from both sides

x = 51

5 0
3 years ago
How far will a train travel in 5hours if it travels at 80ml per hour
Aleks [24]

Answer:

If the ml means miles than its 400

Step-by-step explanation:

3 0
3 years ago
Solve equation<br><br> -2 • 4/5 = -3 1/2 • n
kogti [31]
16/155 = n


explanation

A linear equation is an equation of a straight line. To solve linear equations, it is important to keep the following key concepts in mind:

Maintain balance of the equation by applying the same operations to both sides of an equation

Isolate for the variable by collecting like terms

Use inverse operations to rearrange an equation


to show your work

-8/ 5 = -31/2 • n
- 8/5 = -31n/2
2(-8/5) = 2 • -31/n
-16/5 = -31n
-16/5 / -31 = -31n/31
16/155 = n
8 0
3 years ago
the width of a rectangle is 6 units less than the the length. The area of a rectangle is 7 units. What is the length of the rect
diamong [38]

Answer:

Length: 7 units

Width: 1 unit

Step-by-step explanation:

8 0
3 years ago
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