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WARRIOR [948]
3 years ago
9

Identify the area of a regular decagon with side length 2 m rounded to the nearest tenth

Mathematics
1 answer:
Zina [86]3 years ago
5 0

Answer:

Area = 14.8

Step-by-step explanation:

Area = 5/2 + a^2*sqrt(5 + 2 sqrt(5) )

This formula given the side length, calculates the area.

a = 2

Area = 2.5 + 2^2 * sqrt(5 + 2*sqrt(5) )

Area = 2.5 + 4 * sqrt(5 + 2*2.236)

Area = 2.5 + 4* sqrt(5+ 4.4721)

Area = 2.5 + 4*sqrt(9.4721)

Area = 2.5 + 4*3.0776

Area = 2.5 + 12.3107

Area = 14.8107

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Alabama has about 2.51 million acres of cropland Florida has about 1.15 times as much cropland as Alabama how much crop land doe
aev [14]

Answer: Florida has 2.8865 million acres of cropland .

Explanation:

Since we have given that

Length of acres of cropland Alabama has = 2.51 millions

According to question, we have Florida has about 1.15 times as much cropland as Alabama has ,

So,

Length of acres of cropland Florida has  is given by

2.51\times 1.15=2.8865\text{ million acres }

So, Florida has 2.8865 million acres of cropland .

8 0
3 years ago
Angles 1 and 2 are complementary, and angle 1=3x+3 and angle 2=10x-4, find the degree measure of each angle
tensa zangetsu [6.8K]

Answer:

The measure of the angles:

24°  and   66°

Step-by-step explanation:

Complementary angles sum 90°

then:

(3x + 3) + (10x-4) = 90

3x + 10x + 3 - 4 = 90

13x - 1 = 90

13x = 90+1

13x = 91

x = 91/13

x = 7°

then:

  • angle 1:

3x+3 = 3*7 + 3 = 21+3 = 24°

  • angle 2

10x - 4 = 10*7  - 4 = 70 - 4 = 66°

Check:

66° + 24° = 90°

7 0
3 years ago
Which expression is equivalent to (3-5x)(3+5x)​
Levart [38]
I think the answer is 9-25x
5 0
3 years ago
6:
dem82 [27]

Answer:

D) gallery: g

    balcony: 2g

    main floor: 2g + 225

Step-by-step explanation:

3 0
3 years ago
Need this quick ! Correct answers appreciated
ludmilkaskok [199]
5

g(f(-5))
g( | 2 * -5 + 9 | )
g( |-1| )
g(1)
5
4 0
2 years ago
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