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tatiyna
3 years ago
15

Can you help me and explain how to do it? please​

Mathematics
1 answer:
ki77a [65]3 years ago
7 0

Answer:

125.6cm

Step-by-step explanation:

circumference of a circle is 2pir

pi=3.14

r=d/2=40cm/2=20cm

So, 2pir=2X20cmX3.14=40cmX3.14=31.4cmX4=125.6cm

PLEASE MAAKE THIS THE BRAINLIEST ANSWER

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A square has a area of 466.56m squared work out the peremiter
MissTica

Answer:

Perimeter = 86.4 (m)

Step-by-step explanation:

A square (with side x) has an area of 466.56 (m^2)

=> x^2 = 466.56

=> x = sqrt(466.56) = 21.6

=> Perimeter of this square: P = 4(x) = 4(21.6) = 86.4 (m)

Hope this helps!

3 0
3 years ago
Jethro is planting flowers in his garden. He wants the ratio of tulips to roses to be 2 to 1. Jethro wants to plant a total of 1
attashe74 [19]

Given:

Ratio of tulips to roses = 2:1

Total number of flowers = 18

To find:

The number of tulips.

Solution:

Let the number of tulips and roses are 2x and x respectively.

According to the question,

2x+x=18

3x=18

Divide both sides by 3.

x=\dfrac{18}{3}

x=6

Now,

Number of tulips =2(6)

                           =12

Therefore, the number of tulips is 12.

7 0
3 years ago
Use your shapes to create a new shape with an area of 1 square unit that is not a square. Trace your shape.
Elena-2011 [213]

A new shape with an area of 1 square unit that is not a square can be formed by combining two small triangles

<h3>How to determine the new shape?</h3>

The given parameters are:

  • Area of square = 1 square unit
  • Large triangles = 2
  • Medium triangles = 1
  • Small triangles = 4

The area of each small triangle is:

Area = 0.5 square unit

Multiply both sides by 2

2 * Area of triangle = 1 square unit

Substitute Area of square = 1 square unit

2 * Area of triangle = Area of square

This means that a new shape can be formed by combining two small triangles

Read more about area at:

brainly.com/question/24487155

#SPJ1

7 0
2 years ago
) The correlation between a car’s engine size and its fuel economy (in mpg) is r= -0.774. What fraction of the variability in fu
Zolol [24]

The fraction of the variability in fuel economy is accounted for by the engine size is 59.91%.

Given that, r= -0.774.

To solve such problems we must know about the fraction of the variability in data values or R-squared.

<h3>What fraction of the variability in fuel economy is accounted for by the engine size?</h3>

The fraction by which the variance of the dependent variable is greater than the variance of the errors is known as R-squared.

It is called so because it is the square of the correlation between the dependent and independent variables, which is commonly denoted by “r”  in a simple regression model.

Fraction of the variability in data values = (coefficient of correlation)²= r²

Now, the variability in fuel economy = r²= (-0.774)²

= 0.599076%= 59.91%

Hence, the fraction of the variability in fuel economy accounted for by the engine size is 59.91%.

To learn more about the fraction of the variability visit:

brainly.com/question/2516132.

#SPJ1

3 0
2 years ago
What is 12/3 as an improper fraction?
VladimirAG [237]
The answer is D, 2/3.
8 0
3 years ago
Read 2 more answers
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