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hichkok12 [17]
2 years ago
8

Please help with this?

Mathematics
1 answer:
frez [133]2 years ago
8 0

7p3 = 210
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A regular triangular pyramid has a base area of 31.5 mm2 and a surface area of
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Answer:

A) 220.5 mm^2

Step-by-step explanation:

<u>Explanation</u>:-

Given A regular triangular pyramid has a base of area is 31.5mm^2

and also given surface area of triangular pyramid is 252 mm ^2

by using formula

surface area of  regular triangular pyramid = base of area + half of lateral surface.

surface area = area of the pyramid X \frac{1}{2} lateral surface

252 = 31.5 + \frac{1}{2} lateral surface

252-31.5= \frac{1}{2} lateral surface

220.5 = lateral area of triangular pyramid

lateral area of triangular pyramid = 220.5 mm^2

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3 years ago
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What is the volume of the prism?<br> B=16, H=6, H=7
sergeinik [125]

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Step-by-step explanation:672

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2 years ago
The table represents the start of the division of 15x3 + x2 - 3x + 2 by 3x + 2.
9966 [12]
The result of dividing 15x^{3}+x^{2}-3x+2 by 3x+2 is 5 x^{2} -3x+1 with no remainder. Please check the step by step procedures in the picture attached.
We can conclude that:
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The remainder of the division is 0
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3 years ago
What is the area of a circle with a radius of 21 feet?
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A = \pi 21^{2}

A ≈ 1520.53

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3 years ago
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