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frutty [35]
3 years ago
12

Nhà trường muốn đánh giá tỉ lệ chăm học của sinh viên (trong một tuần). Khảo sát 236 sinh viên thì thấy có 32 sinh viên chăm học

. Hãy ước lượng khoảng đối xứng cho tỉ lệ sinh viên chăm học của trường với độ tin cậy 95%
Mathematics
1 answer:
drek231 [11]3 years ago
4 0

Answer:

can't understand the language

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Please help me
kirza4 [7]
This is a hexagonal prism: Volume = Area of Base (hexagon) x Height:
There are 6 equal equilateral triangles in a hexagone.
The apothem (or altitude of each triangle) = side x (√3)/2 =12(√3)/2 = 6√3
Area of ONE equilateral triangle = (side x altitude)/2:
Area of ONE equilateral triangle = (12 x 6√3)/2 = 36√3 ft²
Area of the SIX equilateral triangles = 36√3 x 6 = 216√3 ft²
VOLUME = BASE X HEIGHT = 216√3 x 15 = 3240√3 ft³

OR VOLUME = 5612 ft³

6 0
3 years ago
Help please i’m not really sure what the answer is
Maslowich

Answer:

The area is 48

The perimeter is 32

4 0
3 years ago
Ben is buying pens and pencils from the store. Pens come in packages
Alinara [238K]
The smallest number of pens he can buy is 4 packages
7 0
3 years ago
A decorative hat is shaped like a cone. The hat has a 7 inch diameter and an 8 inch height.
svetoff [14.1K]

Step-by-step explanation:

the answer to this question is 410.29

sorry if this is wrong

4 0
2 years ago
Please help fast!!!!!!!!!!!!!!
denis-greek [22]

Answer:

The third option, -1/2(30) = -15

Step-by-step explanation:

If it decreases by 1/2, we know it has to be -1/2, and the days we are given are 30. We need to multiply -1/2 by 30 in order to find the water level after 30 days, which would be -15 (inches?) I hope this helped.

5 0
3 years ago
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