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3 years ago

6

The speed of nitrogen molecules in the atmosphere(at 20°C) follows a normal distribution with a mean speed of 500 meters/ second

and a standard deviation of 50 meters/second. Which conclusion does this information best support?

1 answer:

posledela3 years ago

6 0

Answer: 68% of the molecules have speeds between 450 meters/second and 550 meters/second.

Step-by-step explanation:

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A? ________ is an arrangement of r objects chosen from n distinct objects without repetition and without regard to order

aliya0001 [1]

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3 years ago

A number increased by 25% becomes 30 the number is

Masteriza [31]

Answer:

24

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Let 'x' be the number

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3 years ago

Of all rectangles with area 324324, which one has the minimum perimeter? Let P and w be the perimeter and width, respectively

ra1l [238]

Answer:

For w = 18 units perimeter is minimum

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Step-by-step explanation:

Given;

Area of the rectangle = 324 units²

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w is the width

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therefore,

P = 2(L + w) ............(1)

also,

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or

L = $\frac{324}{w}$ ..........(2)

substituting 2 in 1

P = $2(\frac{324}{w} + w)$

now,

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or

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or

$(-1)\frac{324}{w^2}+1$ = 0

or

$(-1)\frac{324}{w^2}$ = -1

or

w² = 324

or

w = 18 units

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therefore,

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P = 2(18 + w)

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3 years ago

The mean electric bill for Family C is approximately

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Do you have a picture to show, so that I can help?

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3 years ago

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Sindrei [870]

Answer: $18 dollars left

Step-by-step explanation:

multiply $4 by 5 that gives you $20 then subtract $20 from $40

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then subtract $20 from $40 then subtract that answer by 2 which leaves you with $18

4 0

3 years ago

Read 2 more answers