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Thepotemich [5.8K]
3 years ago
13

Find the area of each composite figure. Use 3.14 for π. Round to the nearest tenth if necessary. Whats the correct label?

Mathematics
2 answers:
GuDViN [60]3 years ago
8 0

Step-by-step explanation:

Square= bh

Square= 2×2=

half-circle = 1/2Pi*r×r

half-circle 2 = 1/2Pi*r×r

We would put 1/2 for the half-circle because its half of a circle. And we square it because where finding area. The middle is square, and the two up top is half a circle. Hope that helps :D

Readme [11.4K]3 years ago
4 0
There’s two semi-circles with a radius of 2, so it would be 2 x 1/2 x Pi x radius ^2.

Now we need to find the area of the square, which is a^2. The diameter of a circle is double the radius, so we know the sides of the square will equal 4 inches, so 4 x 4.

4 x 4 + 2 x 1/2 x 3.14 x 2^2 should give you your answer. Hope this helps!!


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Which is the slope of the line that passes through the points (2,10) and (5,8)?
patriot [66]

Answer:

Slope = (Y2 - Y1) / (X2 -X1)

Slope = (8 -10) / (5 -2)

Slope = -2 / 3

3 0
3 years ago
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How are a common denominator and a common multiple alike and different
earnstyle [38]
There different bcuz the denominator is the bottom number when u multiply or divide a fraction when u find a common number out of the 2 bottom ones
there alike bcuz they both r numbers in common with the number u r working with.
4 0
3 years ago
Solve the system<br> 16. 2x=y= 0<br> 3x – 2y = -3
Lelu [443]

Answer:

the answer is x is 3 and y is 6

4 0
3 years ago
Noise levels at 3 airports were measured in decibels yielding the following data:
Shalnov [3]

Answer:

a)  The 90% confidence interval for the mean noise level at such locations      

  (112.46 , 163.54)

b) The critical value that should be used in constructing the confidence interval

Z₀.₁₀ = 1.645

Step-by-step explanation:

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

Noise levels at 3 airports were measured in decibels yielding the following data

108   146   160

Mean of given data

         x^{-} = \frac{108+146+160}{3} = 138

x          :     108   146   160

x-x⁻      :      -30   8       22

(x-x⁻ )² :     900   64     484

Variance  σ ² = ∑(x-x⁻ )²/ n-1

                                        = \frac{900+64+484}{3-1}= 724

Standard deviation  

                σ = √724 = 26.90

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

The 90% confidence interval for the mean noise level at such locations                        

       (x^{-} - Z_{0.90} \frac{S.D}{\sqrt{n} } , (x^{-} + Z_{0.90} \frac{S.D}{\sqrt{n} } )

The critical value that should be used in constructing the confidence interval

Z₀.₁₀ = 1.645

         (138 - 1.645 \frac{26.90}{\sqrt{3} } , (138 + 1.645 \frac{26.90}{\sqrt{3} } )

        ( 138 - 25.54 , 138 + 25.54 )

        (112.46 , 163.54)

4 0
3 years ago
the variable z is directly proportional to x. when x is 15, Z has the value 0.2. What is the value of Z when x = 23
Natalka [10]

Answer:

The value of Z = 0.3066... Or 0.31.

Step-by-step explanation:

The formula of direct proportional is a=kb (where k is constant). Given that a=z=0.2 and b=x=15, equation is 0.2=15k,

k=0.2/15

k=0.0133333333333

If x is 23 then what is z?

z=0.0133333333333(23)

z=0.3066666 or 0.31

7 0
3 years ago
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