3 years ago

Find the decimal notation for 84.3%

1 answer:

7 0

to turn a percent into a decimal, move the decimal point 2 places to the left

84.3% = 0.843

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almond37 [142]

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Step-by-step explanation:

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Vlad1618 [11]

7.25/100 = 0.0725 => 0.0725 × 28,000 = 2,030$
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iris [78.8K]

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bulgar [2K]

(√3 - i ) / (√3 + i ) × (√3 - i ) / (√3 - i ) = (√3 - i )² / ((√3)² - i ²)

… = ((√3)² - 2√3 i + i ²) / (3 - i ²)

… = (3 - 2√3 i - 1) / (3 - (-1))

… = (2 - 2√3 i ) / 4

… = 1/2 - √3/2 i

… = √((1/2)² + (-√3/2)²) exp(i arctan((-√3/2)/(1/2))

… = exp(i arctan(-√3))

… = exp(-i arctan(√3))

… = exp(-iπ/3)

By DeMoivre's theorem,

[(√3 - i ) / (√3 + i )]⁶ = exp(-6iπ/3) = exp(-2iπ) = 1

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3 years ago