Answer:
can you explain
Step-by-step explanation:
Answer:
He is missing 1500, the final solution would be 2090
Step-by-step explanation:
5 times 8 equals 40
5 times 30 equals 150
50 times 8 equals 400
50 times 30 equals 1500
40+150+400+1500= 2090
Opposite sides of any rectangular face are parallel, because opposite sides of a rectangle are parallel.
Since HCDE is a rectangle, CD ║ HE.
Since ABCH is a rectangle, AB ║ HC.
Using the De Moivre's Theorem, let us work out for the fourth roots of 81(cos 320° + i sin 320° ).
zⁿ = rⁿ (cos nθ + i sin nθ)
z⁴ = 81(cos 320° + i sin 320° )
z = ∜[81(cos 320° + i sin 320° )]
= ∜[3^4 (cos 4*80° + i sin 4*80°)]
= 3(cos 80° + i sin 80°)
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