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22!
Answer:
The area will be<u> </u><u>113.1</u>
Step-by-step explanation:
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Volume = (1/3) * base area * height
= 1/3 * 24 * 18
= 144 ft^3
P = 12 + 6 + 8,5 = 18 + 8,5 = 26,5 mm
A = 12 × 4 / 2 = 48 / 2 = 24 mm²
This follows from the half-angle identity for cosine.
