As shown in Figure 1, the water depth in a closed rectangular glass tank is 3 cm. If the glass tank is placed as shown in Figure 2, how many cm is the water depth inside?

8 × 6 × 3 ^ (4 × 6), = 144 ^ 24, = 6 (CM), a: the water depth in Figure 2 is 6 cm

The water depth in a sealed cuboid glass jar is 3cm. If the glass jar is placed as shown in the figure below, how many cm is the water depth inside? (glass thickness is not included)
The unit is centimeter
The first picture: horizontal put 8 cm long, 4 cm wide, water depth is 3 cm. The second picture: vertical put 4 cm long, 8 cm wide, height

The water depth of the second figure is 8 × 4 × 3 ^ (4 × 8) = 3cm

One is 40 cm long, 20 cm wide and 30 cm high. It's made of rectangular glass fiber reinforced plastic. The water depth is 18 cm. When an iron ball is immersed in the water, the water surface rises by 25 cm

Bottom area: 20x40 = 800cm & # 178;
Volume of iron ball: 800x25 = 20000cm & # 178;

If the image of the exponential function f (x) passes through the point (2,1 / 2), then the value of F (- 2) =?
Help

What needs to be determined is that the ontology is an exponential function, so it can be set as f (x) = a ^ x, because if f (x) exceeds (2,1 / 2), then f (- 2) = a ^ (- 2) = 2

I don't know what to do next
I seven empty next, new, ha ha~

I don't know what I have to do next.
Or I do not know what I should do next
My English is very good!

It is known that x ^ 2-3x + M can be factorized in the range of integers, and the value of spherical natural number m can be factorized

X ^ 2-3x + M can be factorized to be equivalent to
If x ^ 2-3x + M = 0 is an integer, then
9-4m > = 0, i.e. M

Several application problems of quadratic equation of one variable!
1. There is a two digit number whose sum of one digit number and ten digit number is 8. If you transpose one digit number and ten digit number, the resulting two digit number multiplied by the original two digit number will get 1855. What is the original two digit number? (list and answer, all below)
2. A children's Publishing House published 200000 books in January and 950000 books by the end of March. What is the average monthly growth rate?
3. Xiaoming deposits 1000 yuan in the bank for a fixed period of one year. After he withdraws 600 yuan at the end of the period, he continues to deposit the rest (including interest) in the bank. Is it fixed period or one year, and withdraws all the money after the end of the period, which is exactly 550 yuan. What's the interest rate for a fixed period of one year?
Here are some questions to fill in the blanks
1. - 1 is a root of the equation x ^ 2 + bx-5 = 0, then B=__ The other root is:
2. Given that a root of the equation AX ^ 2 + BX + C = 0 is - 1, then A-B + C=_
If all three sides of a triangle satisfy the equation x ^ 2-6x + 8 = 0, then the perimeter of the triangle is:___

Let the single digit be a and the ten digit be B
A+B=8
(A+10B)*(10A+B)=1855
The solution is b = 5 or 3, so the original two digits are 35 or 53
Set the monthly growth rate as X
January 20 February 20 * (1 + x) March 20 * (1 + x) * (1 + x)
The sum of the three terms equals 90, and the answer is about 43.6%. The other negative solution is rounded off
Let the annual interest rate be X
（1000*（1+X）-600）*（1+X）=550
The answer is 1%
Fill in the blanks only give answers and ideas
Another solution of the first problem is 5 B = - 4
The second question is still Weida theorem. The answer is 0. Weida theorem is great~
The three sides of the triangle are 4.2, so the perimeter is 10

A rectangular swimming pool is 40 meters long and 150 decimeters wide. It covers an area of 600 square meters

40 meters by 15 meters equals 600 square meters

Simple calculation 7.2 times 9.2
I'm in a hurry

7.2 times 9.9
＝7.2*（10-0.1）
＝72-0.72
＝71.28

It's hard to find fault without blowing, and it's hard to know without cleaning

Nitpicking
The source of the original text: "Han Feizi · general": "it's difficult to find small faults without blowing hairs, and it's difficult to detect them without washing dirt."
Seek: seek; defect: defect. Blow the hair on the skin to find the scar. It means to deliberately find fault in others

As shown in Figure 1, the water depth in a closed rectangular glass tank is 3 cm. If the glass tank is placed as shown in Figure 2, how many cm is the water depth inside?