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Burka [1]
3 years ago
5

Can someone please help me with #18?I would really appreciate it.

Mathematics
1 answer:
Sveta_85 [38]3 years ago
7 0
I think when you divide decimals the numbers get bigger but when you divide by a whole number, they get smaller.
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What is the measure of angle x°<br><br> 90°<br> 30°<br> 60°<br> 180°
forsale [732]

Answer:

it is 30°

Step-by-step explanation:

it is 30° because it is smaller that the it is 60° but bigger then the it is 90°(right angle)

4 0
2 years ago
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All of the edges of a regular triangular pyramid have length 12. A frustum of the pyramid has height half of that of the pyramid
vlada-n [284]

Answer:

1) The volume of the frustum is 27·(√3)·h

2) The surface area the frustum is 24·h + 54·√3

Step-by-step explanation:

1) A frustum of the regular triangular prism is a portion of the triangular prism

The length of the edge of the triangle prism = 12

The area of the triangular face, A = (√3/4)·a²

∴ A = (√3/4)·12² = 36·√3

When

The volume of the triangular prism, V = A·h = (36·√3)·h

By triangle proportionality theorem, the cross sectional area of the top half of the triangular prism =  (√3/4)·6² = 9·(√3)

The volume of the top half, V₂ = 9·(√3)·h

The volume of the frustum = V - V₂ = (36·√3)·h - 9·(√3)·h = 27·(√3)·h

The volume of the frustum = 27·(√3)·h

2) The surface area of the triangular side of the frustum is given as follows;

A = 36·√3- 9·(√3) = 27·(√3)

The surface area the frustum, F_A = 2×27·(√3) + 2 ×6 ×h + 12×h = 24·h + 54·√3

The surface area the frustum = 24·h + 54·√3

4 0
3 years ago
Find the area of the rhombus below.
scoray [572]
<h2>Area = 80 ft²</h2><h2>------------------------------</h2>

<u>Step-by-step explanation:</u>

diagonal 1 (d1) = 5 + 5

= 10 ft

diagonal 2 (d2) = 8 + 8

= 16 ft

area of rhombus = 1/2 × d1 × d2

= 1/2 × 10 × 16

= 80 ft²

<h2>--------------------------------</h2><h2>Follow me</h2>
4 0
3 years ago
Brianna has a 50$ online gift certificate from a book store. The cost of each book is $9. There is also a shipping charge of 5$
ZanzabumX [31]

Answer:

5 books

Step-by-step explanation:

I just went through the nines multiplication table until I got to 9 * 5 which equals 45, and then since it charges $5 for the shipping fee, $45 + $5 = $50 so 5 books would be the amount she can buy

6 0
2 years ago
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1. The box plot shows the ages of people attending a music concert. (4 points)
zhannawk [14.2K]

did you get the answers

8 0
3 years ago
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