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Illusion [34]
3 years ago
13

A circular picture is 8 inches in diameter what is the area of the picture in square inches

Mathematics
2 answers:
barxatty [35]3 years ago
6 0

area = PI x r^2

radius = 1/2 diameter

1/2 of 8 = 4

3.14 x 4^2 = 3.14 x 16 = 50.24 square inches ( answer may vary depending on what you use for PI. 3.14 is common)

Lemur [1.5K]3 years ago
3 0
The formula for the area of a circle is:
A=3.14r^2
To find the radius you divide the diameter by 2 so:
8/2=4
Then plug in 4 for the radius and solve.
A=3.14x4^2
A=3.14x16
A= 50.24
So the answer is 50.24 square inches
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12.4. Measure of Dispersion<br>2076 Q.No. 15 Find the standard deviation of: 4, 6, 8, 10, 12.​
Alenkinab [10]

Answer:

Standard deviation of given data = 3.16227

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Given sample size 'n' = 5

Given data  4, 6,8,10,12

Mean = \frac{4+6+8+10+12}{5} = 8

Mean of the sample x⁻ = 8

Standard deviation of the sample

                  S.D = \sqrt{\frac{Sum(x-x^{-} )^{2} }{n-1}}

<u><em>Step(ii)</em></u>:-

Given data

x          :         4      6       8       10      12

x-x⁻      :      4 - 8   6-8   8-8    10-8    12-8

(x-x⁻)   :        -4      -2     0          2        4

(x-x⁻)²  :        16     4       0         4        16  

 

  S.D = \sqrt{\frac{Sum(x-x^{-} )^{2} }{n-1}}

  S.D = \sqrt{\frac{16+4+0+4+16}{4}}

 S.D = √10 = 3.16227

<u><em> Final answer</em></u>:-

The standard deviation = 3.16227

8 0
2 years ago
In the figure below determine the midpoints
Digiron [165]
Midpoints are points in the middle, so I believe they are Midpoints: D, F and E
3 0
3 years ago
Can you help me with this question?
Rufina [12.5K]

Answer:

  16.2

Step-by-step explanation:

The angle internal to the triangle at B is the supplement of the one shown, so is 65°. That is equal to the angle internal to the triangle at D. Since the vertical angles at C are congruent, the two triangles are similar by the AA theorem.

Corresponding sides of similar triangles are proportional, so we can write the proportion shown in the attachment:

  BC/FC = DC/AC

  BC = FC(DC/AC) = 21.6(7.2/9.6)

  BC = 16.2 . . . . matches the first choice

4 0
3 years ago
Easy 100 points, plz answer ASP! Please include an explanation!!
valina [46]

Answer:

The third option

Step-by-step explanation:

the most reasonable

6 0
3 years ago
Read 2 more answers
Solve for x:<br> -1/3(4x+2)=1/3(x+11)<br><br> A. -13/3<br> B. -3<br> C. -13/5<br> D. -9/5
Nataly_w [17]
X=-13/5

Simplify both sides of the equation, isolate the variable, and then you get your answer. 
7 0
3 years ago
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