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notka56 [123]
3 years ago
15

a piece of coal in a shape of a square pyramid has base edge pf 8.2 in on each side and with height of 5.3 in. What is the volum

e?
Mathematics
2 answers:
lozanna [386]3 years ago
4 0
Volume = 1/3a^2h

v= 1/3 x 8.2^2 x 5.3

v=118.79066666667 in^3
vredina [299]3 years ago
3 0
The volume is 43.46.
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A B and D

Step-by-step explanation:

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Which substance is a mixture?<br> salt<br> gasoline<br> aluminum<br> carbon dioxide
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1)a chord of length 18cm midway the radius of a circle. calculate the radius of the circle correct to 1d.p. 2)if two parallel ch
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Part 1:

Given that the length of the chord is 18 cm and the chord is midway the radius of the circle. 

Thus, half the angle formed by the chord at the centre of the circle is given by:

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Therefore, the radius of the circle is 10.4 cm to 1 d.p.


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Given that the radius of the circle is 10 cm and the length of chord AB is 8 cm. Thus, half the length of the chord is 4cm. Let the distance of the mid-point O to /AB/ be x and half the angle formed by the chord at the centre of the circle be θ, then

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Part 2II:

Given that the radius of the circle is 10cm and the angle distended is 80 degrees. Let half the length of chord CD be y, then:

\sin40^o= \frac{y}{10}  \\  \\  \\ \Rightarrow y=10\sin40^o=6.428

Thus, the length of chord CD = 2(6.428) = 12.856 which is approximately 12.9 cm.
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3 years ago
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