How is the formula calculated???

Known r pl s

Then l rs p s pl r

It's hard to explain.

It's better to use an analogy:

Knowing p, l, s, find the formula r:

A and B 2 (p 2) people buy pears, each person pays 6 (l 6) yuan, and each catty of pears **3 (s 3) yuan, then how many (r) can they buy in total? ) catty; then r pl s (2 6) 3 4;

It is known that r, s, and p find the formula l:

A and B 2 (p 2) people go to buy pears, 3 (s 3) yuan per catty of pears, if you want to buy a total of 4 (r 4) catties, then; Then how much does A and B get for each person (l ?) ）l＝rs／p ＝（4×3）／2＝6

Knowing the formula of p, l, and r, I believe that the landlord can follow the same pattern.

In the future, ask questions to explain the physical meaning of each variable, otherwise there may be countless ways to explain it:

For a cylindrical conductor, its resistance r is proportional to the length of the cylinder and inversely proportional to the cross-sectional area of the cylinder, and that p should be a constant related to the characteristics of the object at the root of the poem, for example, conductors such as aluminum, gold, silver, copper, etc., have different electrical conductivity p, which is also related to temperature.

Why is it estimated in this way: From the perspective of the history of modern physics, since Galileo's experimental method was proposed, the laws of physics are all explanations of experimental results, as long as you can explain the experimental phenomenon, it means that your formula is correct, and it is better to adapt to it!

The reduction of the surface area of 56 square centimeters is the area of the four faces with a height of 2 centimeters cut off, so the area of each surface divided by the height of the truncated part is the long side of the small rectangle 56 4 (faces) 2 (width) = 7 centimeters.

From the truncation of 2 cm into a cube, it can be seen that the original cuboid is a square column of 7*7cm, and the high height is 7+2cm

So the volume of the cuboid is 7*7*(7+2)=441 cubic centimeters.

The side length of the newly obtained cube = 56 2 7 = 7 cm. So it turns out that the length and width of the cuboid are both 7 cm. The height is 7 + 2 = 9 cm. So it turns out that the volume of the cuboid is 7x7x9 = 441 cubic centimeters.

This doesn't seem to be a formula, the solution idea: the height is reduced by 2 centimeters to become a cube, that is, the bottom surface of the cuboid is a square, that is, the length and width, and the height is exactly 2 centimeters more than the length and width. The reduction of 56 square centimeters is exactly 4 of the same sides, and their width is exactly the 2 centimeters of the reduction.

So 56 4 is the area of a polygon, divided by 2 to be long.

Let the height of the cuboid be a, the length be b, and the width be c, then: a-2=b=c (1)2(ab+bc+ac)-56=2(a-2)b+2bc+2(a-2)c(2) from (2) to obtain 4b+4c=56(3), from (1) and (3) to obtain a=9, b=c=7, then the volume of the cuboid is 7 7 9=441, and the volume of the cuboid is 441.

Height-2=square, which means length = width, and if length x, there is v=x (x+2).

From the meaning of the title: the reduced surface area = the sum of the areas of the 4 sides, so s'=4 2x=8x=56, so x=7

then v=7 (7+2)=49 9=441

Variable cost ratio = variable cost Sales revenue = 60%, so total variable cost = 18 million Operating leverage coefficient = (sales revenue - variable costs) (sales revenue - variable costs - fixed costs) = 3000-1800) (3000-1800-400) = financial leverage factor will not be easily changed.

Operating leverage coefficient = (sales revenue - variable costs) (sales revenue - variable costs - fixed costs) = 50-50 * 60%) 50-10-50 * 60%) = 2 financial leverage coefficient = ebit (ebit-i) = 10 (10-40 * 50% * 10%) = compound leverage coefficient = 2*

First, a company currently has annual sales of 700,000 yuan, a variable cost rate of 60%, a total fixed cost of 180,000 yuan (excluding interest), an income tax rate of 40%, and a total capital of 500,000 yuan, of which the common share capital is 300,000 yuan (30,000 ordinary shares, the par value of each share is 10 yuan), and the debt capital is 200,000 yuan (the annual interest rate is 10%). Under the condition of the current total capital of 500,000 yuan, the company's annual sales can reach 720,000 yuan, in order to achieve the goal of increasing earnings per share by 70%, the company is considering increasing capital to expand operations, and intends to raise an additional 200,000 yuan. There are two ways to raise it:

All ordinary shares were issued, with an additional 20,000 shares with a par value of 10 yuan per share. All long-term borrowings are raised, with an annual interest rate of 20%, and after the company's capital increase, its sales can reach up to 1 million yuan. Calculate the company's current total leverage factor.

Calculate sales when current earnings per share increase of 70%. Calculate sales revenue when earnings per share after capital increase are not differentiated. Determine what financing option the company should choose.

Sales attributable to a 70% increase in earnings per share after the capital increase.

Second, the annual sales of an enterprise is 800,000 yuan, the variable cost rate is 60%, the fixed cost is 200,000 yuan, and the total capital is 1 million yuan, of which the common share capital is 400,000 yuan (40,000 ordinary shares are issued, and the par value of each share is 10 yuan), the financing fee is 4%, the dividend interest rate is expected to be 15%, and the dividend growth rate is expected. Issued bonds of 250,000 yuan, with an annual interest rate of 10% and a handling fee rate of 2%. Long-term loan of 150,000 yuan, annual interest rate of 8%, binding balance of 8%.

Retained earnings of 200,000 yuan. The corporate income tax rate is 40%. If the company wants to raise an additional 300,000 yuan, there are two options:

The first is to issue 30,000 ordinary shares with a par value of 10 yuan per share. The second is to issue 300,000 yuan of long-term bonds with an annual interest rate of 13%, and the company's sales are expected to reach 1.1 million yuan after additional financing.

Calculation formulas are some of the connections that people find when they study things in natureand a method of expression that is expressed in a certain way. It is the equal or unequal connection between the number of different things in nature, it accurately reflects the relationship between the inside and outside of things, and is the basis for us to reach another thing from one thing, so that we can better understand the essence and connotation of things.

Perimeter: Circumference of the rectangle = (length + width) 2 = 2(a+b) = (a+b) 2.

The circumference of the square = the side length 4 = 4a.

Circumference of the circle = pi diameter = d = pi radius 2 = 2 r.

The first c is (4x3) (2x1)=6

The second c is 5

Their product is 30

Formula calculation: Indicates the number of start and stop. For example, the lower i=2 and the upper number 10 indicate that it is from 2 to 10. Such as:

2i+1) represents the sum: (2*2+1)+(2*3+1)+(2*4+1)+2*10+1)=222.

The 2i+1 in the formula i=2 is the general term formula ai of the series, i is the ordinal number of the terms, i=2 means that the calculation starts from the second term of the series, and the top 10 is the cut-off of the 10 terms.

How do you calculate your story? The calculation of the specific topic is not necessarily, so her calculation method is also different.

Do you want to state which formula you are using, or what you are going to calculate? There is no ** here, and there is no detailed text description, there is no way to do it.

Then you have to see what the formula is, you have to sigh and calculate.

I didn't know it, so I went to check my phone myself.

You have to see the question to know how to calculate the formula.

Little by little, come across a map of vintage-style clothes.

<> such as the spring buried picture, the superscript Lingsen comm should not have a ruler to sell x=.