Where do you put the stamp

Where do you put the stamp

Where is the seal?

The school has built two cylindrical flower beds of the same size. The diameter of the bottom of the flower bed is 4 meters, and the notice is 9 decimeters
The height of the flower bed is three-thirds of the height of the flower bed?

3.14 × (4 △ 2) &# 178; × 0.9 × 2 / 3 = 7.536 m3, each flowerbed filled with 7.536 m3

Nine ordinal number word right antonym factory complex word catch past tense hair complex word feel past tense quickly comparative grade o (∩)_ Thank you

ninth
left
factories
caught
hairs
felt
more quickly

1. In △ ABC, BC = a, AC = B, a, B are two roots of the equation x & sup2; - 2 √ 3x + 2 = 0, and 2cos (a + b) = 1
(1) The degree of ∠ C (2) the length of ab
2. It is known that a, B and C are the opposite sides of angles a, B and C in △ ABC, and S is the area of △ ABC. If a = 4, B = 5 and S = 5 √ 3, the value of C can be obtained
3. In △ ABC, (A & sup2; + B & sup2; - C & sup2;) tanb = √ 3aC, find B
4. In the acute triangle ABC, edges a and B are the roots of the equation x & sup2; - 2 √ 3x + 2 = 0, a and B satisfy 2Sin (a + b) - √ 3 = 0, and calculate the area of ∠ C, edge C and △ ABC
5. In △ ABC, if C = 4, B = 7, the length of the midline ad of BC side length is 7 / 2, then find the side length a
Well, can someone do it? It's urgent

1) From 2cos (a + b) = 1, we get a + B = 60 ° so C = 120 °; and a, B are the two roots of equation x2-2 √ 3x + 2 = 0, so a + B = 2 √ 3, ab = 2, from cosine theorem, AB ^ 2 = 10, so AB = √ 10.2) s = AB * sinc / 2, so sinc = √ 3 / 2, so C = 60 ° or 120 °; 3) from cosine theorem, sine theorem, we get

Do all the verbs in a past tense sentence need to be changed into the past tense, including auxiliary verbs or copulars, modal verbs
Give an example to illustrate the situation

No, it's just that the predicate after the subject becomes the past tense according to the situation, but generally there is only one subject, and the auxiliary verb changes the past tense followed by the verb prototype

What is the law of 55 * 55-54 * 54 and 37 * 37-23 * 23?

Square difference formula: a * A-B * b = (a + b) * (a-b)
55*55-54*54=(55+54)*(55-54)=99
37*37-23*23=(37+23)*(37-23)=60*14=840

If the complex Z satisfies | Z + (√ 3) + I | ≤ 1, then:
(1) Maximum and minimum values of | Z |
(2) Maximum and minimum values of | Z-1 | ^ 2 + | Z + 1 | ^ 2
(3) Maximum and minimum values of | Z - √ 3 | ^ 2 + | z-2i | ^ 2
be deeply grateful!
be deeply grateful!

You draw a coordinate axis, where the coordinates of o point (0,0) and a point (√ 3,1), so the vector OA represents (√ 3) + I. because Z is also a complex number, it can also be understood as a vector, and it is unknown, so Z represents a point a as the starting point and any point as the ending point

What are the principles of historical materialism

1. The essence, structure and social form of society. The history of labor development is the key to understand all social history. Natural environment and population are the natural premise of human history and the necessary conditions for social existence and development. The coordinated development of environment, population and society and the implementation of sustainable development strategy. Social life is practical in essence

Which is followed by a noun in a question, singular or plural
Which city/cities do you like?
Explain that and in other sentences

All right
Which city do you like?
Which cities do you like?

How to calculate the side area, bottom area and surface area of a cylinder with a diameter of 12cm and a height of 8cm?

Side area 2 π RH = 301.44
Bottom area π RR = 113.04
Surface area = side area, bottom area * 2 = 527.52