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Lubov Fominskaja [6]
3 years ago
10

What is the volume of a hemisphere that has a diameter of 12.6 cm, to the nearest tenth of a cubic centimeter?

Mathematics
1 answer:
scoundrel [369]3 years ago
3 0
Volume of a sphere = 4/3 pi r^3
A hemisphere is half a sphere so 1/2*4/3 pi r^3 = 2/3 pi r^3
Given diameter = 12.6 but we need radius so diameter /2 or 12.6/2 r=6.3
2/3*pi*6.3^3 =
2/3*pi*250.047
166.698*pi
= 523.7
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Nancy put new insulation in her attic and discovered that her heating bill for December decreased from $160 to $100. What is the
WINSTONCH [101]

Answer:

37.5% decrease

Step-by-step explanation:

To find a relative percentage you generally follow the rule of part divided by whole.

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2 years ago
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3 years ago
Simplify the expression
Natalija [7]

Step  1  :

 (23 x 2 -  5) • x 3

Step  2  :

Trying to factor as a Difference of Squares :

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Proof :  (A+B) • (A-B) =

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(8 x 2 - 5) • x 3

3 0
3 years ago
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Answer:

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Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
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seropon [69]

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Number two gets the same explanation just with different numbers.

3 0
3 years ago
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