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Helga [31]
3 years ago
15

Pls help i will give brainliest

Mathematics
2 answers:
Flura [38]3 years ago
5 0
The answer is c. 28.26 cm^2
ryzh [129]3 years ago
3 0

Answer:

28.26

Step-by-step explanation:

A

=

π

r

2

=

π

·

3

2

≈

28.27433

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A community pool that is shaped like a regular pentagon needs a new cover for the winter months. The radius of the pool is 20.10
boyakko [2]

Answer:

960.42\text{ ft}^2

Step-by-step explanation:

Please find the attachment.  

We have been given that a community pool that is shaped like a regular pentagon needs a new cover for the winter months.

To find the area of community pool we will use area of pentagon formula.

\text{Area of pentagon}=\frac{1}{2}a*p, where, a represents the apothem or perpendicular distance from the center of the pentagon and p represents perimeter of pentagon.

Let us find the perimeter of our given pentagon by multiplying each side length by 5.

\text{Perimeter of community pool}=5\times 23.62

\text{Perimeter of community pool}=118.1

Now let us find apothem of our pentagon by using Pythagoras theorem.  

a^2=20.10^2-11.81^2

a^2=404.01-139.4761

a^2=264.5339

a=\sqrt{264.5339}

a=16.2645

Upon substituting our given values in above formula we will get,

\text{Area of community pool}=\frac{1}{2}\times 16.2645\times 118.1

\text{Area of community pool}=8.13224907\times 118.1

\text{Area of community pool}=960.418615627971\approx 960.42

Therefore, the area of the pool that needs to be covered is 960.42 square feet.

3 0
4 years ago
Read 2 more answers
Find the surface area of the prism.<br><br> _ m2
Marysya12 [62]

Answer:

so i think its 136m^2

at  the bottom: 6 x 7 = 42

sides: 5 x 7 x 2 = 70

triangles : 2 x 1 / 2 x 6 x 4 = 24

42+70+24 equals to 136!! hope u understand ^^

7 0
3 years ago
Answer as soon as possible and I will make you the brainliest!!!!!!
Nady [450]

Answer:

72 cubic inches

Step-by-step explanation:

A volume of a box can be found using this equation: l x w x h

Length x Width x Height. We're given all 3 of the values, so multiply them together and voila, it's the volume of the given box!

8 x 3 x 3 = 72

7 0
3 years ago
Read 2 more answers
What is the answer to 4+{[1+(5-2]×3} is
OverLord2011 [107]

Answer:

16

Step-by-step explanation:

5-2=3+1=4*3=12+4=16

3 0
3 years ago
Read 2 more answers
HELP MEEEEEE PLEASE&lt;3
Mama L [17]

Answer:

3 3/5 miles

Step-by-step explanation:

6 3/4 divided by 1 7/8=

3 3/5

4 0
2 years ago
Read 2 more answers
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