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Tatiana [17]
3 years ago
7

The area of a circle is 3.142cm square.find the radius and diameter of the circle

Mathematics
2 answers:
Paul [167]3 years ago
5 0
Area of circle = pi x radius^2 = 3.142
This means the radius must be 1 cm. pi x 1^2 = 3.142 4sf
The diameter is therefore = 2 cm
suter [353]3 years ago
3 0

Answer:

50.24 or 50.272

Step-by-step explanation:

Square radius and then times by 3.14 or 3.142

4^2*3.14 = 50.24

4^2*3.142 = 50.272

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Step-by-step explanation:

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8 0
2 years ago
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Prove that the diagonals of a rectangle bisect each other.
Umnica [9.8K]

Answer:

2

Step-by-step explanation:

example A(2a,0),B(2b,0)

C(2b,2c),D(2a,2c)

mid point of AC=((2a+2b)/2,(0+2c)/2)=(a+b,c)

mid point of BD=((2b+2a)/2,(0+2c)/2)=(a+b,c)

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7 0
3 years ago
The difference between the value of the sample statistic and the value of the corresponding population parameter is called the _
mel-nik [20]

Answer: c. sampling error

Step-by-step explanation:

  • A population parameter is a number that is evaluated to describe the whole population . For example : Population mean , Population standard deviation etc.
  • A sample statistic gives the estimate value of the population parameter. For example : Sample mean , sample proportion.

Since, the sample is a subset of population , so there are chances for unavoidable variation in sample mean from the population mean that varies from sample to sample .

This variation is known as sampling error.

∴ The difference between the value of the sample statistic and the value of the corresponding population parameter is called the sampling error .

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7 0
3 years ago
Bruno is a manager at a factory that makes in-line skates. The
SashulF [63]

Answer:

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Step-by-step explanation:

Given that the equation

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where   y, the number of pairs of skates the factory has in the warehouse, and x be the number of hours

The slope-intercept form

                y = m x +C

Given equation  200x - y + 500 = 0

                          200 x + 500 =y

                       y = 200 x + 500

Slope of the equation m = 200 and y-intercept 'C' = 500

4 0
3 years ago
9/6 × 4/5 <br> 1 <br>) 36/11<br>) 6/5<br>) 32/30<br>) 13/15​
erik [133]

Answer:

6/5

Step-by-step explanation:

9×4=36

6×5=30

36/30÷2

18/15÷3

6/5

6 0
2 years ago
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