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Sholpan [36]
3 years ago
14

There are 15 girls and 12 boys what is the ratio of boys and girls

Mathematics
1 answer:
Vesnalui [34]3 years ago
3 0

Answer:

4:5

Step-by-step explanation:

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1/49

Step-by-step explanation:

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3 years ago
Find the total area for the regular pyramid.
hram777 [196]

Answer:

  • Option B

Step-by-step explanation:

Given is the hexagonal pyramid.

We know the radius of the base is same as its side.

<u>Find the base area:</u>

  • A = 3√3/2a²
  • A = 3√3/2*6² = 54√3

<u>Given the height and radius, find the side of the lateral triangular faces:</u>

  • \sqrt{8^2+6^2} =\sqrt{100} =10

Each of 6 triangles have sides 10, 10 and 6 units.

<u>Find the area using heron's formula:</u>

  • s = P/2 = (10*2 + 6)/2 = 13
  • s - a = s - b = 13 - 10 = 3
  • s - c = 13 - 6 = 7
  • A = \sqrt{s(s-a)(s-b)(s-c)} =\sqrt{13*3*3*7} =3\sqrt{91}

<u>Total surface area:</u>

  • S = 6*3\sqrt{91}+54\sqrt{3}  =18\sqrt{91}+54\sqrt{3}

Correct choice is B

3 0
2 years ago
What is the answer to this problem what is a protractor to find a angle<br>​
AlladinOne [14]

Answer:

what? im confused

Step-by-step explanation:

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2 years ago
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Part A: For each problem, write an expression using parenthesis, and then solve.
slavikrds [6]
<span>1. $119 2. 64 beads 3. 4 candles 4</span>
6 0
3 years ago
7. Krista wrote a list of factors and a list
Lubov Fominskaja [6]

Answer:

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Step-by-step explanation:

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