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miss Akunina [59]
4 years ago
6

Find area, answer in terms of π​

Mathematics
1 answer:
Tcecarenko [31]4 years ago
4 0

Answer:

Step-by-step explanation:

radius of circle=4

diameter=4×2=8

width=2 half circles means diameter=8

length=2 diameters=2×8=16

area=16×8=128

4 half circles make two circles

area of two circles=2×π r^2=2×π×4²=32 π

reqd . area=128-32 π=32(4-π)

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You test calories for a food item. The brand name has a mean of 158.706 and a sample standard deviation = 25.236, when seventeen
jarptica [38.1K]

Answer:

option C

Step-by-step explanation:

given,

\bar{x_1} = 158.706, \sigma_1 = 25.36 , n_1= 17

\bar{x_1} = 122.471, \sigma_1 = 25.183 , n_2= 17

α = 1 - 0.95 = 0.05

degree of freedom (df) = 17 -1 = 16

critical value= t_{\alpha/2},df = t_{0.025},16 =2.120 (from t-table)

margin of error = t_{\alpha/2}\sqrt{\dfrac{s_1^2}{n_1}+\dfrac{s_2^2}{n_2}}

=2.120\times \sqrt{\dfrac{25.36^2}{17}+\dfrac{25.183^2}{17}}[/tex]

= 2.120 x 8.6467

= 18.33

Margin of error = 18.33

Point estimation of difference = \bar{x_1} - \bar{x_2}

                                                  = 36.235

lower limit = 36.235 - 18.33 = 17.91

upper limit = 36.235 + 18.33 = 54.57

hence, the nearest option near to answer is option C

4 0
3 years ago
Please help due soon please and thank you
Sunny_sXe [5.5K]
The answer is A, 75 degrees
add all like terms
2x+196
all triangles equal 180 degrees
2x+196=180
subtract the 196 from 180
2x= -16
divide
x= -8
plug into angle A
-8+83
A=75
4 0
2 years ago
Help ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
natali 33 [55]

Answer:

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8 0
3 years ago
Jake is solving x^2-6x+5=0 by completing the square his steps are shown below step 1. x^2-6x=-5 step 2. x^-6x+9=-5+9 step 3. (x-
damaskus [11]

Answer:

Jake's error in step 3

Step-by-step explanation:

we have

x^{2} -6x+5=0

Complete the square

step 1

Group terms that contain the same variable, and move the constant to the opposite side of the equation

x^{2} -6x=-5

step 2

Complete the square. Remember to balance the equation by adding the same constants to each side

x^{2} -6x+9=-5+9

x^{2} -6x+9=4

step 3

Rewrite as perfect squares

(x-3)^{2}=4

Jake's error in step 3

He placed 6 instead of 3 in the left side

step 4

take square root both sides

\sqrt{(x-3)^2} =\sqrt{4}

step 5

(x-3)=\pm2

step 6

x=3\pm2

step 7

x=5 and x=1

7 0
4 years ago
Integral of cotxlogsinx
Shtirlitz [24]
Hello there is a solution : 

3 0
3 years ago
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