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3 years ago

PLEASE HELP I WILL GIVE BRAINLIEST TO QUICKEST RESPONSE

Mathematics

2 answers:

musickatia [10]3 years ago

5 0

Answer:

2.3

Step-by-step explanation:

Andru [333]3 years ago

5 0

Answer:

The answer is 2.3

Step-by-step explanation:

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Which is the approximate measure of angle Y? Use the law of sines to find the answer.

vitfil [10]

Siny/2.7=sin63/2.8

siny=2.7sin63/2.8

y=arcsin((2.7sin63)/2.8)

y≈59.23° (to nearest one-hundredth of a degree)

8 0

3 years ago

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A group of researchers wants to know whether men are more likely than women to contract a novel coronavirus. They surveyed two r

olasank [31]

Answer:

Test statistic Z= 0.13008 < 1.96 at 0.10 level of significance

null hypothesis is accepted

There is no difference proportion of positive tests among men is different from the proportion of positive tests among women

Step-by-step explanation:

<em>Step(I)</em>:-

Given surveyed two random samples of 390 men and 360 women who were tested

first sample proportion

$p_{1} = \frac{360}{390} = 0.9230$

second sample proportion

$p_{2} = \frac{47}{52} = 0.9038$

Step(ii):-

Null hypothesis : H₀ : There is no difference proportion of positive tests among men is different from the proportion of positive tests among women

Alternative Hypothesis:-

There is difference between proportion of positive tests among men is different from the proportion of positive tests among women

$Z = \frac{p_{1}- p_{2} }{\sqrt{PQ(\frac{1}{n_{1} }+\frac{1}{n_{2} } } }$

where

$P = \frac{n_{1}p_{1} +n_{2} p_{2} }{n_{1}+n_{2} }$

P = 0.920

$Z= \frac{0.9230-0.9038}{\sqrt{0.920 X0.08(\frac{1}{390}+\frac{1}{52} } )}$

Test statistic Z = 0.13008

Level of significance = 0.10

The critical value Z₀.₁₀ = 1.645

Test statistic Z=0.13008 < 1.645 at 0.1 level of significance

Null hypothesis is accepted

There is no difference proportion of positive tests among men is different from the proportion of positive tests among women

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3 years ago

What is the perimeter of a rectangle that has a length of 40 Ft and a width of 17 ft?

statuscvo [17]

Answer:

i think 114ft

Step-by-step explanation:

5 0

1 year ago

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The points (3, 9) and (–3, –9) are plotted on the coordinate plane using the equation y = a • x. What is the value of a? Enter y

Ilia_Sergeevich [38]

So fill out the coordinate with those given numbers, and count how far apart they are and you will get your answer. Then times it by x.

8 0

3 years ago

Need help with this question ASAP!<br> 20 points!

Delvig [45]

Answer:

6√3

Step-by-step explanation:

Use the sin formula, which is sin = opp / hyp

sin 60 = x / 12

x = 12 sin 60

x = 6√3

4 0

3 years ago