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Daniel [21]
3 years ago
11

A circle has area 2251 m2. What is its diameter?

Mathematics
1 answer:
Gemiola [76]3 years ago
8 0

Answer:

53.54m

Step-by-step explanation:

Using the formulas

A=πr2

d=2r

Solving for d

d=2A

π=2·2251

π≈53.53562m

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In order to justify this claim for the Ferengi a sample of 16 coils is taken. For this sample set, the mean warp phase flux is f
Kay [80]

Answer:

The responses to these question can be defined as follows:

Step-by-step explanation:

n = 16\\\\  \bar{x}= 73.7\\\\\sigma = 12\\\\a = 0.05\ or\  a = 0.10\\\\H_{o} \ : \mu = 68\\\\H_{a} \ : \mu \neq 68\\\\a = 0.05\\\\

critical values =\pm t0.025,15 = \pm 2.131\\\\

(n-1) = 15^{\circ}\\\\a = 0.10\\\\

critical values= \pm t0.05,15 = \pm 1.753\\\\

(n-1) = 15^{\circ}\\\\

Testing the statistic values:

t = \frac{x-\mu_{0}}{ \frac{s}{\sqrt{n}}}\\\\

  = \frac{73.7-68}{(\frac{12}{\sqrt{16}})}\\\\\  = \frac{5.7}{(\frac{12}{4})}\\\\  = \frac{5.7}{(3)}\\\\  = 1.9\\

Test statistic ta = -1.90\ lies

The critical values\pm t_{0.05,15} =\pm 1.753

It is in the region of dismissal. We dismiss the 10% significant null hypothesis.

t_a = 1.90 \\\\df = 15\\\\a = 0.05\\\\p-value = 076831\\\\

P - value is greater than the level of significance a= 0.05  

Null hypothesis we don't reject. At a 95% level, the claim is justified.

t_a = 1.90\\\\ df = 15\\\\  a = 0.10\\\\p-value = 076831\\\\

P - value below the meaning level a = 0.10, we reject the hypothesis null. At a level of 90% the claim is not justified.

3 0
3 years ago
HELP PLEASEEEE THANKS
olga2289 [7]
I think it is A. 76 degrees
8 0
3 years ago
Read 2 more answers
Melodys family wants to go to Hawaii, which is a 3,700 mile airplane ride. Write the number of miles in scientific notation
jenyasd209 [6]

Answer:

3.7*10^3

Step-by-step explanation:

Step one:

given data

3,700 mile

In scienctific notation or in standard form  3,700 mile  is expressed as

3.7*10^3

7 0
3 years ago
The diameter of a circle is 13 cm. Find its area to the nearest tenth.
rodikova [14]

Answer:

The answer is 132.665, but if you want to round it to the nearest tenth it would be 132.7. (Hope it helps!)

Step-by-step explanation:

Diameter=13

13 divided by 2= radius

13 divided by 2=6.5

Multiply radius twice and by 3.14.

6.5 x 6.5 x 3.14= 132.665 or 132.7

5 0
3 years ago
3 sisters are each 2 years apart in age. The youngest sister is Emily the middle sister Samantha and the older sister is Lauren
Jet001 [13]
Emily is 12, Samantha is 14, and Lauren is 16. Basically all you do to solve this problem is add numbers that are two apart until you find something. 

Ex. 2+4+6=12  4+6+8=18 so on and so forth. 
3 0
3 years ago
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