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yaroslaw [1]
3 years ago
15

Find the area of this shape

Mathematics
1 answer:
expeople1 [14]3 years ago
6 0

Answer:

640.75 cm

Step-by-step explanation:

I think idk i suck at math so if i get it wrong don't be surprised.

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Helppppppppppppppppppppppppp
Wewaii [24]

Answer:

Radius: 8

Circumference: 50.27

πr^2 = Area of circle

201.06 = πr^2

divide by pi

201.06 / π = 63.9993857161 = 64

64 = r^2

Square root both sides to get radius.

\sqrt{64} = 8

r = 8

Circumference = π x diameter

Diameter = 2 x radius

Circumference = π x 16 = 50.2654824574 = 50.27

8 0
3 years ago
Express this decimal as a fraction.<br> please explain as well.
Vikki [24]

8/10 if simplified 4/5 idk how to explain it tho lol

8 0
3 years ago
Find the probability for choosing a letter at random from the word: PROBABILITY
kicyunya [14]
1/11
<span>1/11
</span><span>1/11
</span><span>1/11
</span><span>1/11</span>
3 0
3 years ago
A university researcher wants to estimate the mean number of novels that seniors read during their time in college. An exit surv
lys-0071 [83]

Answer:

Population mean = 7 ± 2.306 × \frac{2.29}{\sqrt{9} }

Step-by-step explanation:

Given - A university researcher wants to estimate the mean number

            of  novels that seniors read during their time in college. An exit

            survey was conducted with a random sample of 9 seniors. The

            sample mean was 7 novels with standard deviation 2.29 novels.

To find - Assuming that all conditions for conducting inference have

              been met, which of the following is a 94.645% confidence

              interval for the population mean number of novels read by

              all seniors?

Proof -

Given that,

Mean ,x⁻ = 7

Standard deviation, s = 2.29

Size, n = 9

Now,

Degrees of freedom = df

                                = n - 1

                                = 9 - 1

                                = 8

⇒Degrees of freedom = 8

Now,

At 94.645% confidence level

α = 1 - 94.645%

   =1 - 0.94645

  =0.05355 ≈ 0.05

⇒α = 0.5

Now,

\frac{\alpha}{2} = \frac{0.05}{2}

  = 0.025

Then,

t_{\frac{\alpha}{2}, df }  = 2.306

∴ we get

Population mean = x⁻ ± t_{\frac{\alpha}{2}, df } ×\frac{s}{\sqrt{n} }

                           = 7 ± 2.306 × \frac{2.29}{\sqrt{9} }

⇒Population mean = 7 ± 2.306 × \frac{2.29}{\sqrt{9} }

3 0
3 years ago
Read 2 more answers
Can you please help me on this question 6(1-4r)+3r=-3(3r-2)-6r
Lisa [10]

Answer:

r=0

Step-by-step explanation:

1. Remove Parentheses

2. Cancel equal terms

3. Collect like terms

4. Move variable to the left

5. Collect like terms

6. Divide both sides by -6

8 0
3 years ago
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