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3 years ago

Pls help!! need it to study fr the exam tmrw

Mathematics

2 answers:

IrinaK [193]3 years ago

3 0

Answer:

$\frac{88}{4} \\ 22 \\ here \: u \: go$

REY [17]3 years ago

3 0

Answer:

22 cm

Step-by-step explanation:

The angle subtended at the centre by the arc is 90°

This represents $\frac{90}{360}$ = $\frac{1}{4}$ of the circle

The arc length will be quarter of the circumference, that is

arc = $\frac{1}{4}$ × 88 = 22 cm

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Put these numbers in order from greatest to least.<br><br> 0.24,0.57,0.87, and 3/5

Pani-rosa [81]

Answer:

These are the numbers in order from greatest to least.

0.24, 0.57, 3/5, and 0.87

Step-by-step explanation:

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3 years ago

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Viktor [21]

Answer:

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6. Kiera is comparing the cost of two swimming pool memberships to determine which she will buy. Pool K charges a $30 membership

balandron [24]

Answer:

Pool K cost equation : 30 + 5V , Pool M cost equation : 10 + 10V

Pool K slope & intercept = 30 & 5 , Pool M slope & intercept = 10 & 10

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Total cost [Pool] = Fixed (membership) cost + Variable cost (per visit)

<u>Intercept</u> is part at which equation line intersects x or y axis. In pools case, it is fixed (membership) cost. <u>Slope </u> is change in y due to change in x. In pools case, it is variable cost (per visit)

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where V = number of visits.

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3 years ago

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mafiozo [28]

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3 years ago

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In a survey of 447 registered voters, 157 of them wished to see Mayor Waffleskate lose her next election. The Waffleskate campai

Hitman42 [59]

<h2>Answer with explanation:</h2>

Let p be the true proportion of registered voters wish to see Mayor Waffleskate defeated.

As per given , we have

$H_0: p\leq0.27\\\\ H_a: p >0.27$

Sample size : n= 447

Number of of registered voters wish to see Mayor Waffleskate defeated = 157

I.e. sample proportion : $\hat{p}=\dfrac{157}{447}\approx0.3512$

Confidence interval for population proportion is given by :-

$\hat{p}\pm z^*\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

, where n= sample size

$\hat{p}$ = sample proportion

z* = critical z-value.

Critical z-value for 98% confidence interval is 2.33. (By z-table)

Then, the 98% confidence interval for the proportion of registered voters who wish to see Waffleskate defeated will be :

$0.3512\pm2.33\sqrt{\dfrac{0.3512(1-0.3512)}{447}}\\\\=0.3512\pm (2.33)(0.022577656)\\\\=0.3512\pm 0.05260593848\\\\=(0.3512-0.05260593848,\ 0.3512+0.05260593848)\\\\=(0.29859406152,\ 0.40380593848)\approx(0.299,\ 0.404)$

Since the 0.27 < 0.299 , it means 0.27 does not belong to the above confidence interval.

So , we reject the null hypothesis ( $H_0$ ).

So , <u>98% confidence interval does not support the claim.</u>

3 0

3 years ago

Pls help!! need it to study fr the exam tmrw​

Pls help!! need it to study fr the exam tmrw