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OLga [1]
2 years ago
14

PLEASE PLEASE HELP ASAPP

Mathematics
2 answers:
adoni [48]2 years ago
5 0

Answer:

17pi/15

Step-by-step explanation:

s = r *theta where r is the radius and theta is the central angle in radians

Convert 51 to radians

51 * pi/180 = 51pi/180

s = 4 * 51pi/180

   = 17pi/15

vaieri [72.5K]2 years ago
4 0

Answer:

Arc\ length = 3.6 cm

Step-by-step explanation:

Arc \ Length = 2 \pi r \frac{ \theta}{360}

                 = 2 \times \pi \times 4 \times \frac{51 }{360}\\\\=2 \times \pi \times \ 4 \times 0.142\\\\=3.5688  \\\\Arc\ length = 3.6 cm

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The American Bankers Association reported that, in a sample of 120 consumer purchases in France, 48 were made with cash, compare
tatuchka [14]

Answer:

Step-by-step explanation:

Hello!

You have the information for two variables

X₁: Number of consumer purchases in France that were made with cash, in a sample of 120.

n₁= 120 consumer purchases

x₁= 48 cash purchases

p'₁= 48/120= 0.4

X₂: Number of consumer purchases in the US that were made with cash, in a sample of 55.

n₂= 55 consumer purchases

x₂= 24 cash purchases

p'₂= 24/55= 0.4364

You need to construct a 90% CI for the difference of proportions p₁-p₂

Using the central limit theorem you can approximate the distribution of both sample proportions p'₁ and p'₂ to normal, so the statistic to use to estimate the difference of proportions is an approximate standard normal:

[(p'₁-p'₂) ± Z_{1-\alpha /2} * \sqrt{\frac{p'_1(1-p'_1)}{n_1} +\frac{p'_2(1-p'_2)}{n_2} }]

Z_{0.95}= 1.648

[(0.4-0.4364)±1.648 * \sqrt{\frac{0.4(1-0.4)}{120} +\frac{0.4364(1-0.4364)}{55} }]

[-0.1689;0.0961]

The interval has a negative bond, it is ok, keep in mind that even tough proportions take values between 0 and 1, in this case, the confidence interval estimates the difference between the two proportions. It is valid for one of the bonds or the two bonds of the CI for the difference between population proportions to be negative.

I hope this helps!

8 0
3 years ago
What are the coefficients of the like terms in this expression? 18x - 9xy + 12x
likoan [24]
Steps to my answer:

18x-9xy+12x

Add similar elements together,  your answer comes out to be:
=30x-9xy
I hope this is what you were looking for! :) 
6 0
3 years ago
Read 2 more answers
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Minchanka [31]

Answer:

-8.

Step-by-step explanation:

-2|-1+5|

The absolute value function |-1+5| = |4| = 4

-2 * 4 = -8.

You are right.

6 0
2 years ago
Jayda takes her dog Rolo to obedience training once each week. Jayda bought a box of
Korolek [52]

Answer:

I'll leave my comment here to give your post an up

6 0
2 years ago
Read 2 more answers
Somebody could help me ? ..
Hoochie [10]

Answer:

1/5

Step-by-step explanation:

8 0
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