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Leni [432]
3 years ago
9

What is the approximate area of the circle shown below?

Mathematics
2 answers:
oksano4ka [1.4K]3 years ago
7 0

Answer:

it should be 201.062

Step-by-step explanation:

area of a circle is pi times the radius to the power of 2.

Karolina [17]3 years ago
4 0

Answer:

A is approximately 201 cm^2

Step-by-step explanation:

The diameter of the circle is 16 so the radius is 1/2 of the diameter

1/2 * 16 = 8

The area of the circle is

A = pi r^2

A = 3.14 * 8^2

A =200.96 cm^2

A is approximately 201 cm^2

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Answer:

7.5

Step-by-step explanation:

It is longer than 5, so cross 2.5 and 5 out, 10 is too big, so 7.5 is the correct answer

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irga5000 [103]

Answer:

Option C

Step-by-step explanation:

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3 years ago
Read 2 more answers
Find an equation for the perpendicular bisector of the line segment whose endpoints are
Andrew [12]

The equation of the perpendicular bisector is y = -\frac{7}{2} x + 2

Step-by-step explanation:

Let us revise the relation between the slopes of perpendicular lines

  • The product of the slopes of two perpendicular lines is -1
  • That means if the slope of one of them is m, then the slope of the other is -\frac{1}{m}
  • You reciprocal the slope of one and change its sign to find the slope of the other

The mid point of a segment whose endpoints are (x_{1},y_{1}) and (x_{2},y_{2}) is (\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2})

The perpendicular bisector of a line is the line that intersect it in its mid-point and formed 4 right angles

∵ The end point of a given line are (9 , -3) and (-5 , -7)

∴ x_{1}=9 and x_{2}=-5

∴ y_{1}=-3 and y_{2}=-7

- Find the slope of the line by using the rule of the slope m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}

∵ m=\frac{-7-(-3)}{-5-9}=\frac{-7+3}{-14}=\frac{-4}{-14}=\frac{2}{7}

∴ The slope of the given line is \frac{2}{7}

To find the slope of the perpendicular bisector of it reciprocal it and change its sign

∴ The slope of the perpendicular bisector = -\frac{7}{2}

∵ The form of the linear equation is y = mx + b, where m is the

   slope and b is the y-intercept

- Substitute the value of m in the equation

∴ The equation of the perpendicular bisector is y = -\frac{7}{2} x + b

To find b substitute x and y in the equation by a point on the line

∵ The perpendicular bisector of the given line intersect it at

   its midpoint

- Find the mid-point of the given line busing the rule above

∵ x_{1}=9 and x_{2}=-5

∵ y_{1}=-3 and y_{2}=-7

∴ The mid-point of the given line = (\frac{9+(-5)}{2},\frac{-3+(-7)}{2})=(\frac{4}{2},\frac{-10}{2})=(2,-5)

Point (2 , -5) is also lies on the perpendicular line

∴ x = 2 and y = -5

- Substitute them in the equation

∵ -5 = -\frac{7}{2} (2) + b

∴ -5 = -7 + b

- Add 7 to both sides

∴ 2 = b

- Substitute the value of b in the equation

∴ The equation of the perpendicular bisector is y = -\frac{7}{2} x + 2

The equation of the perpendicular bisector is y = -\frac{7}{2} x + 2

Learn more:

You can learn more about the linear equation in brainly.com/question/11223427

#LearnwithBrainly

8 0
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Law Incorporation [45]

Answer:

You can multiply the brackets to make sure you get 4x² + 4x + 1. Since the numbers in the brackets are the same, we can just use one of them and let it equal to 0. Then solve it. ∴ The answer is x = -1/2.

Step-by-step explanation:

4x2+4x+1=(2x+1)2 or  (2x+1)(2x+1)

4 0
3 years ago
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