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Thepotemich [5.8K]
2 years ago
12

Find the perimeter of the figure to the nearest hundredth.

Mathematics
1 answer:
bekas [8.4K]2 years ago
8 0

Answer:

38.56

Step-by-step explanation:

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A coin is tossed 72 times. What is a reasonable prediction for the number of
Aneli [31]

Answer :

That’s it, the probability of getting tail on a single coin toss times the number of observations.

In this case, 1/2 * 72 = 36

However, there’s something called chance error. How much do you expect the result to differ from the expected value? It can be calculated as follows:

The Standard Deviation of this experiment is  √(0.5)(0.5) =0.5

The Standard Error is  √72 (0.5) ≈ 4.18330 round to the nearst tenth is 4

So, the expected value is 36, give or take 4.

And since the number of tails in a toss coin experiment is normally distributed, then you can expect the number of tails to be between -2 and +2 SEs from the expected value 95% of the time.

In other words, if you repeat this experiment a large number of times, you can expect to obtain between 27 and 43 tails 95% of the time.

Hope this helps

4 0
2 years ago
Help plsssssssssssssssssssss
Alika [10]

Answer:

a. .15 b. 5.40

Step-by-step explanation:

Hi! The first thing you want to do is find the unit rate, which would be 9 divided by 60. This should be 15 cents per hour. Next, for the second part, you multiply by 36, which should be $5.40. Hope this helps!

5 0
2 years ago
Solve this problem using substitution
Sergeeva-Olga [200]
Solving for (x,y)
(x-y=8)
(x=y-8) & (y=x-8)

solving for (y,x)
(2y=2x-16)
(y=x-8)&(x=y+8)


6 0
3 years ago
PLEASE PLEASE HELP! QUICKLY!
Oksanka [162]

Step-by-step explanation:

we have

m∠3 = 128°

m∠3 = m∠7---------------- > Corresponding Angles

180°=m∠7+m∠8---------- > Supplementary Angles

therefore

m∠8=180°-128°=52°

the answer is the m∠8 is 52°

5 0
3 years ago
How to multiply 14*25*4 useing friendly numbers
Mnenie [13.5K]
Im not too sure what friendly numbers are being that I never leraned that but

14*25*4 is 1400

work:

 the easiest thing to do first is 25*4 which gives you a product of 100
the multiply 14 by 100 wich is 1400

i hope this helped
5 0
3 years ago
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