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4 years ago

Approximately 3.1 million deaths per year. How many per minute

Mathematics

1 answer:

Charra [1.4K]4 years ago

4 0

Answer:

5.898

Step-by-step explanation:

There are 365 days in a year.

There are 24 hours in a day.

There are 60 minutes in an hour.

In a day, there are 60 minutes each hour x 24 hours = 1440 minutes

In a year, there are 1440 minutes per day x 365 days = 525600 minutes

3.1 million = 3,100,000

3,100,000 / 525600 = 5.898 (rounded from 5.89802130898)

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Write a cosine function that has a midline of 2, an amplitude of 4 and a period of 4/7

ella [17]

Answer:

$y= 4cos(\frac{7\pi }{2}x)+2$

Step-by-step explanation:

We know that the transformations of a cosine equation can be shown as:

y=±a(b(x-h))+k

Where 'a' is the amplitude

'b' is the horizontal change (Do 2π/b to find the period)

'h' is the horizontal shift

and 'k' is the vertical shift or midline.

------------------------------------------------------

If the amplitude is 4, we can assume a=4.

Since the period is 4/7, we can solve for the 'b' value by:

$2\pi /\frac{4}{7}= \frac{7\pi }{2}$

Next, since the midline is 2, we know that a vertical shift of 2 occurred. Thus, the 'k' value is 2.

Writing this equation gives us:

$y= 4cos(\frac{7\pi }{2}x)+2$

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4 years ago

Find The Circumference of The Circle with Diameter 2.1cm

Sonbull [250]

Answer:

Step-by-step explanation:

Since the diameter is 2.1 then its radius is 1.05.

Therefore the circumference is $C=2\pi r=2\pi (1.05)=2.1\pi$ .

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3 years ago

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5x² + 2 = 12 square roots

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I believe it’s 27 square root sorry if I’m wrong! :/

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3 years ago

Pre image ABCD was dilated to be image A’B’C’D, where the center of dilation is the origin. What scale factor was used in the di

ArbitrLikvidat [17]

Answer:

The scale factor is 0.25

Step-by-step explanation:

we know that

The dilation is a non-rigid transformation that produce similar figures

If two figures are similar, then the ratio of its corresponding sides is proportional and this ratio is called the scale factor

In this problem

ABCD and A'B'C'D' are similar

therefore

$\frac{A'B'}{AB}=\frac{B'C'}{BC}=\frac{C'D'}{CD}=\frac{A'D'}{AD}$

Find the scale factor

Looking at the graph

we have

$A'B'=1\ unit\\AB=4\ units$

Let

z ---> the scale factor

$z=\frac{A'B'}{AB}$

substitute the values

$z=\frac{1'}{4}=0.25$

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3 years ago

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3 years ago

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