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GarryVolchara [31]
3 years ago
9

Help me? Can't figure it out

Mathematics
1 answer:
Simora [160]3 years ago
5 0
Pi = 3. Area of a circle = pi×r squared.

R is radius, and the radius of that circle is 11 m. therefore, 3.14×11 squared will give you your answer. Don't forget, exponent before multiplication

11^2 = 121
121×3 = 363 That's the area of the big circle.

Now, 11÷2 gives you the radius of the small circles. you get 4.5
4.5^2 = 20.25
20.25*3 = 60.75

That's the area of ONE small circle. double it and you have the area of 2.

60.75×2= 121.5

Now just subtract the area of the small ones from the area of the big one to find the area of the shaded region.

363-121.5= 241.5

Now, you're done!
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Find the population variance and standard deviation. 8​, 17​, 29​, 35​, 41 Choose the correct answer below. Fill in the
Nuetrik [128]

Answer:

(a) σ²  = 144

(b) s² = 12

Step-by-step explanation:

(a) Population variance σ² = ∑(X - \overline{X})² / N

The arithmetic mean \overline{X} = \frac{8 + 17 + 29 + 35 + 41}{5}

                                   \overline{X} = \frac{130}{5}

                                   \overline{X} = 26

σ²  =  \frac{(8 - 26)^{2} + (17 - 26)^{2} + (29 - 26)^{2} + (35 - 26)^{2} + (41 - 26)^{2}}{5}

     =  \frac{(- 18)^{2} + (- 9)^{2} + (3)^{2} + (9)^{2} + (15)^{2}}{5}

     =  \frac{324\ +\ 81\ +\ 9\ +\ 81\ +\ 225}{5}

     = \frac{720}{4}

σ²  = 144

(b) Standard\ deviation = \sqrt{Variance}

                                   = \sqrt{144}

                                   = 12

 

7 0
3 years ago
What is the sale price to the nearest cent? $239 television; 10% discount
miv72 [106K]

Answer:

The sale price will be:  $215.10

Step-by-step explanation:

We know that:

Sale price = Regular price × (100% - Discount %)

                 = Regular price × (100% - 10%)

                 = 239 × 90%

                 = 239 × 0.9

                 = 215. 10 $

Therefore, the sale price will be:  $215. 10        

3 0
2 years ago
If you have a bag of 4 red and 6 blue marbles, the probability of picking a red, putting it back,then picking a blue.
Afina-wow [57]

Answer:

well theres a four in ten chance that you'll draw a red one then there's a six in ten chance of drawing a blue

Step-by-step explanation:

5 0
3 years ago
3+8-4x2-12 <br> Put parentheses to get the answer 2
sesenic [268]
(3+8-4)x2-12 =2 the answer is 2
5 0
3 years ago
What is the volume of this aquarium 24 in 8 in 12 in
mote1985 [20]
2304 cubic inches. You multiply the length, width, and base
4 0
3 years ago
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