2 years ago

Please help, need answer fast! Which equation is equivalent to ?

Mathematics

1 answer:

Alexandra [31]2 years ago

5 0

The answer is d. 8g^6h^4k^12 - h^25k^15

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In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2455 subjects randomly select

Genrish500 [490]

Answer: 0.355,0.405)

Step-by-step explanation:

Given : Significance level : $\alpha=1-0.99=0.01$

Number of subjects (n) = 2455

Number of surveys returned = 931

The probability of surveys get return will be :-

$p=\dfrac{931}{2455}=0.379226069246\approx0.38$

The confidence interval for proportion is given by :-

$p\pm z_{\alpha/2}\times\sqrt{\dfrac{p(1-p)}{n}}$

$0.38\pm z_{0.005}\times\sqrt{\dfrac{0.38(1-0.38)}{2455}}\\\\=0.38\pm(2.576)0.0098\\\approx0.38\pm0.025=(0.355,0.405)$

Hence, the 99% confidence interval for the proportion of returned surveys : (0.355,0.405)

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3 years ago

Randall’s family drove to the beach for vacation. They drove the same speed throughout the trip. The first day, they drove 130 m

nata0808 [166]

390 Miles per 6 Hours.

6 0

2 years ago

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Please help!!! Simplify in standard form.<br><br> (2x5+x3−3x4−x+8)−(7x5+2x4−12+6x−5x3+x2)

Ilia_Sergeevich [38]

<span>(2x^5+x^3−3x^4−x+8)−(7x^5+2x^4−12+6x−5x^3+x^2)
= </span>2x^5 − 3x^4 + x^3 −x + 8 − 7x^5 - 2x^4 + 5x^3 − x^2 − 6x + 12
= − 5x^5 − 5x^4 + 6x^3 − x^2 − 7x + 20

hope it helps

7 0

2 years ago

Kade solved this problem:

fredd [130]

Parent: 5 child: 9
I’m not completely sure though please let me know if I’m right!

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2 years ago

If a 16 in. by 24 in. window has a wooden frame 3 inches wide surrounding it, what is the total area of the window and frame?

Arturiano [62]

16 + 3 = 19
24 + 3 = 27

19 * 27 = 513

Answer: 513 in squared

Hope this helped!

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2 years ago

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