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belka [17]
2 years ago
14

Andreas patio is composed of a rectangle and a semi circle as shown in the figure below which is the best estimate of the area o

f Andreas patio in square meters

Mathematics
1 answer:
Vladimir79 [104]2 years ago
8 0

Answer:

38.13m²

Step-by-step explanation:

We find the area of ;

Rectangule and semicircle

Area of rectangle :

Length * width

Length = 8m ; width = 3m

Area = 8 * 3 = 24m²

Area of semicircle = 1/2 πr²

Radius, r = 3m

A = 1/2 * 3.14 * 3²

A = 1/2 * 3.14 * 9

A = 14.13 m²

Area of patio :

(24 + 14.13)m²

= 38.13m²

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Brainest for best answer only 5 mins left show your work
Kamila [148]

Answer:

Step-by-step explanation:

Problem One

Perimeter is in meters not square meters. The equation is

2*(6.8+x) + 2*12.5= 47                Remove the brackets. Combine like terms  

13.6 + 2x + 25 = 47

38.6 + 2x = 47                            Subtract 38.5 from both sides

2x = 47 - 38.6  

2x = 8.4                                      Divide by 2

x = 4.2

Answer D

Problem 2

This problem is asking that you calculate the perimeter of a swimming pool.

The two semicircles on the ends make a whole circle.

The diameter of the semicircles is obtained from the difference of the two given lengths.

The rectangle has a length of 12. The length of the rectangle and the 2 semicircles is 16. The difference is 4. You could divide this by 2 to get the radius. I would just leave it as the diameter.

So the perimeter is pi*d + 2 * 12 [there are 2 lengths]

Perimeter = 4*pi + 24

Perimeter = 12.56 + 24

Perimeter = 36.56

Answer A

Problem 3

This is the circle inside the square.

The radius of the circle = 9

The diameter of the circle and the length of square's side = 2*9 = 18

The area of the square = s^2  where s = 18

The area of the square = 18^2 = 324

The area of the circle = pi * 9^2 = 3.24 * 81 = 251.34

The area of the Shaded area = 324 - 251.34 = 69.66

Answer C

Problem 4

b1 = 5

b2 = 11.5

h = 4.5

Formula

Area = (b1 + b2 ) * 4.5/2

Area =  (5 + 11.5) * 4.5 /2

Area = 16.5 * 4.5 / 2

Area = 74.25/2

Area = 37.125

Answer D

5 0
3 years ago
Open the picture, help me and get 10 points
Hitman42 [59]
13 feet wide.
156/12=13
Brainliest plz
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3 years ago
Determine if the following function is even, odd, or neither.. . f(x) = –9x^4 + 5x + 3. Show step-by-step solution.
Simora [160]

Answer:

96/45

Step-by-step explanation:

56

847748

38303[

4 0
3 years ago
A recipe calls for 3/4 cup milk, and Daniel wants to make 5 batches. He only has the three measuring cups shiwn there
Katyanochek1 [597]

Answer:

Tell him to buy 5 batch size cups.

Step-by-step explanation:

7 0
3 years ago
What is the sum of the finite arithmetic series ? 7.6+6.3+5+3.7+2.4+1.1+(-0.2)+(-1.5)
BartSMP [9]

\text{Consider the sum of the finite arithmatic series}\\
\\
7.6+6.3+5+3.7+2.4+1.1+(-0.2)+(-1.5)\\
\\
\text{We know that the sum of the finite arithmatic series }\\
\\
a_1,a_2, a_3, ..., a_n \text{ is given by the formula}\\
\\
S_n=\frac{n}{2}\left ( a_1+a_n \right )\\
\\
\text{here in the given series, we can see that }a_1=7.6, \ a_n=-1.5 \text{ and}\\
\text{the number of terms is, }n=8. \text{ so using above formula, we get}

S_8=\frac{8}{2}\left ( 7.6+(-1.5) \right )\\
\\
=4\left ( 7.6-1.5 \right )\\
\\
=4\left ( 6.1 \right )\\
\\
=24.4

Hence the sum of the finite Arithmetic series is: 24.4

5 0
3 years ago
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