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3 years ago

What’s a constant Proportionality

1 answer:

7 0

In mathematics, two variables areproportional if there is always aconstant ratio between them. Theconstant is called the coefficient ofproportionality or proportionality constant. ... x and y are directlyproportional if the ratio yx is constant.

In other words, the constant of proportionality is also the slope, **m**, rate of change, etc.

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Can help me with: cosx/senx cotx =1

Stolb23 [73]

I assume the question was true or false. Here is how you verify the identity— which is true :)

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3 years ago

The diameter of cold virus cell is about 3x10-9 meter,and the diameter of a streptoccus bacterium cell is about 9x10-7 meter. Wh

Archy [21]

Here we need to compare the orders of magnitude of two measures.

We will see that the bacteria is 300 times larger than the virus.

We know that:

The diameter of the virus-cell is:

$D_v = 3 \cdot 10^{-9} m$

The diameter of the bacteria cell is:

$D_b = 9 \cdot 10^{-7} m$

So, to compare them, first notice that both are in the same units, meters, so we only need to compare the numbers.

Is common sense to identify the one with the largest exponent as the largest number, and the largest exponent is -7, thus the bacteria should be the larger one.

But let's prove this with math, remember the property:

$\frac{a^n}{a^m} = a^{n - m}$

Let's take the quotient between the diameters and see what we get, I will use the diameter of the bacteria in the numerator, thus if the quotient is larger than 1, it would mean that the bacteria is greater and by how much.

$quotient = \frac{ 9 \cdot 10^{-7} m}{ 3 \cdot 10^{-9} m} = \frac{9}{3} \cdot 10^{-7 + 9}\\\\= 3*10^2$

So we can say that the bacteria is 3*10^2 = 3*100 = 300 times larger than the virus.

If you want to learn more, you can read:

brainly.com/question/4953281

8 0

2 years ago

Which value for y makes the equation y - 2.5 = 1.95 true? A. y = 0.78 B. y = 4.875 c. y = 48.75 D. y = 4,875

irina1246 [14]

Answer: B is the answer

Step-by-step explanation:

7 0

2 years ago

Is y=x squared a linear or nonlinear function

Leto [7]

Answer:

Linear. y = x also equals y = 1x, and you can put a line on a graph using this equation, hence the name linear.

5 0

3 years ago

Rewrite 8/8 and 2/8 as a mixed number. PLEASE HELP RUNNING LATE ON MY WORK!!!!!!

Alekssandra [29.7K]

9514 1404 393

Answer:

1 1/4

Step-by-step explanation:

You know that 8/8 = 1.

Removing a common factor of 2 from numerator and denominator of 2/8 reduces the fraction to lowest terms: 1/4

Your mixed number is 1 1/4.

6 0

2 years ago