Which number is a perfect cube? 5 100 125 150
1 answer:
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Answer:
C
Step-by-step explanation:
The area (A) of a regular decagon is
A = perimeter × apothem
perimeter = 10 × 8 = 80 in, thus
A = 0.5 × 80 × 12.3 = 492 in² → D
The solving for the first one should be like this
And the next part
After these manipulations just multiply them
And finally you need to square and simplify for the completed answer
And the next part
After these manipulations just multiply them
And finally you need to square and simplify for the completed answer