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guajiro [1.7K]
3 years ago
9

What is the area of the red? Use 3.14 for π.

Mathematics
1 answer:
grigory [225]3 years ago
8 0
Ask your teacher that’s all you have to do.
You might be interested in
Considering the number of questions incorrect from classmates on a quiz {10, 11, 12, 13, 13, 13, 14, 15, 16, 16, 17, 18, 18, 19,
IrinaK [193]

Answer:

According to the Empirical Rule, 68% of the data should fall between 11.98 and 18.02

Step-by-step explanation:

We are given the following data in the question:

10, 11, 12, 13, 13, 13, 14, 15, 16, 16, 17, 18, 18, 19, 20

Formula:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.  

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

Mean =\displaystyle\frac{225}{15} = 15

Sum of squares of differences = 25 + 16 + 9 + 4 + 4+ 4 + 1 + 0+ 1+ 1 + 4 + 9 + 9+ 16 + 25 = 128

S.D = \sqrt{\dfrac{128}{14}} = 3.02

Empirical rule:

  • According to this rule almost all the data lies within three standard deviation of the mean for a normal distribution.
  • About 68% of data lies within one standard deviation of the mean.
  • About 95% of data lies within two standard deviations of mean.
  • Arround 99.7% of data lies within three standard deviation of mean.

Thus, by empirical rule,

\mu \pm 1\sigma = 15\pm (3.02) = (11.98,18.02)

According to the Empirical Rule, 68% of the data should fall between 11.98 and 18.02

5 0
3 years ago
Can y’all also explain the steps
Hunter-Best [27]

Answer:

B. is your answer

Step-by-step explanation:

First you multiply both sides by "x" and you get

12x - 4 = 3x

now add 4 to both sides and you get

12x = 3x + 4

now subtract "3x" from both sides and you get

9x = 4

divide both sides by 9 and you get

x = 4/9

3 0
3 years ago
The polynomial 16x + 2 is a . Adding the term to the polynomial would make it a trinomial.
neonofarm [45]
Idk b, im stuck on the same thing
8 0
4 years ago
Find the value of Y helpppp
DIA [1.3K]

Answer:

y = 4

Step-by-step explanation:

Both the triangles are congruent by SSS postulate.

Therefore,

4y + 8 = 24 \\ (corresponding \: sides \: of \:  \\ congruent  \:  \triangle s) \\ 4y = 24 - 8 \\  \\ 4y = 16 \\  \\ y =  \frac{16}{4}  \\  \\ y = 4

3 0
3 years ago
What is 19 +(11+37) then added 19 and 11 what is that
IrinaVladis [17]
97, 19+(11+37)=19+(48)=67 and then add 30 because of 19 and 11 and you get 97
7 0
3 years ago
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