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olga nikolaevna [1]
3 years ago
13

I need help and my teacher wont help

Mathematics
1 answer:
BaLLatris [955]3 years ago
8 0

Answer:

\bold{8\pi} or \bold{25.12}

Step-by-step explanation:

We know that as shown by the diagram, the radius is 4. So in this case, we want to find the circumference of the entire circle, then just multiply by \frac{3}{4}, because the radii from the intact section are perpendicular.

The circumference of a circle is just \pi \times d where d is the diameter of the circle. The diameter is just the radius \times 2 which gives us

                                            d = 4 \times 2 = 8

Thus lending us 8\pi or 25.12 if we substitute \pi with 3.14.

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Which expression shows twice the sum of 8 and a number n?
IRISSAK [1]
Correct Answer: A. 2(n+8).
6 0
3 years ago
The cost of fencing a Square Garden is 400 at the rate of 1 per metre find its length​
grin007 [14]

Here Is The Answer:

Perimeter of garden = 400 m

side of square = 400 / 4

                       = 100 m

Area of garden => 100 m x 100 m

                        => 10000 m^2

Hope It Helps You!!!  

Have A Nice Day!!!  ^_^

8 0
2 years ago
4. What is the volume of the cylinder? Express answer in terms of a (hold and
Vladimir [108]

Given:

Base area = 4π mm²

Height = 10 mm

To find:

The volume of the cylinder.

Solution:

Base of the cylinder is circle.

Area of the base = πr²

πr² = 4π

Volume of the cylinder = πr²h

Substitute 4π in place of πr².

                                      = 4π × 10

                                      = 40π mm³

The volume of the cylinder is 40π mm³.

4 0
3 years ago
A square outdoor patio with side length x feet is surrounded by a brick walkway that is 4 feet wide. What is the area of the wal
Masja [62]

Answer:

Area of walkway = 16(x+4) ft^{2}

Step-by-step explanation:

Length of the sides of the square outdoor = x feet

Area of the square outdoor = length x length

                            = x * x

                            = x^{2} ft^{2}

The square outdoor is surrounded by 4 feet of walkway. So that,

length of the walkway = (x + 2(4))

                                     = (x + 8)

Area of walkway with outdoor = (x + 8)*(x + 8)

                                      = (x^{2} + 16x + 64) ft^{2}

Area of walkway = Area of walkway with outdoor - Area of the square outdoor

                            = ( x^{2} + 16x + 64) - x^{2}

                            = 16x + 64

Area of walkway = 16(x+4) ft^{2}

7 0
2 years ago
4/10 + 3/16 = what is the answer of the addition fraction
natka813 [3]

Answer:

4/10+3/16=47/80

Step-by-step explanation:

(4/10×8/8)+(3/16×5/5)=?

32/80+15/80=?

32+15/80=47/80

3 0
2 years ago
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