3 years ago

The floor of a rectangular banquet hall has an area of 3,600 m². The length is 90 m.

Mathematics

1 answer:

Grace [21]3 years ago

8 0

Answer:

The width of the banquet hall is 40 m.

Hope this helps and have a nice day!

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20) In a recent poll of 1200 randomly selected adult office workers, 32% said they had worn a Halloween costume to the office at

Allisa [31]

Answer: Option 'c' is correct.

Step-by-step explanation:

Since we have given that

n = 1200

x = 32% of 1200

So, $\hat{p}=32\5=0.32$

We need to find 95% confidence interval.

so, z = 1.96

So, margin of error would be

$z\times \sqrt{\dfrac{p(1-p)}{n}}\\\\=1.96\times \sqrt{\dfrac{0.32\times 0.68}{1200}}\\\\=1.96\times 0.0135=$

So, Interval would be

$\hat{p}\pm \text{margin of error}}\\\\=0.32\pm 0.0263\\\\=(0.32-0.0263,0.32+0.0263)\\\\=(0.2937,0.3463)\\\\=(0.294,0.346)\\\\=(29.4\%,34.6\%)$

Hence, Option 'c' is correct.

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3 years ago

Find the derivative of y= 1 / x

givi [52]

Answer:

dy/dx = -1/ $x^{2}$

Step-by-step explanation:

y = 1/x

dy/dx = d/dx(1/x)

=> dy/dx = d/dx( $x^{-1}$ )

=> dy/dx = - $x^{-2}$

=> dy/dx = -1/ $x^{2}$

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3 years ago

The table gives predictions of the average costs of a gasoline car after the year 2030. Which graph best represents the relation

kiruha [24]

Answer:

It's the b graph

Step-by-step explanation:

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2 years ago

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Luba_88 [7]

Answer:

Step-by-step explanation:

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3 years ago

7 - 9x - 15 + 12x HELPPPP

Gekata [30.6K]

Simplify. Combine like terms

12x - 9x = 3x

7 - 15 = -8

3x - 8 is your answer

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3 years ago

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