2 years ago

Hey can you please help me posted picture of question

1 answer:

6 0

The correct answer is option C.

The solution is shown below:

(8 - 3i)(6 + 5i)

= 8(6 +5i) - 3i(6 + 5i)

= 48 + 40i - 18i - 15i²

= 22i + 48 - 15(-1)

= 22i + 48 + 15

= 22i + 63

= 63 + 22i

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Answer:

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Step-by-step explanation:

From the question we are told that

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$P( X \ge x ) =1- P( \frac{X - \mu }{\sigma } < \frac{ x - 67900 }{ 2050} ) = 0.04$

$\frac{X -\mu}{\sigma } = Z (The \ standardized \ value\ of \ X )$

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$1.751 = \frac{ x - 67900 }{ 2050}$

=> $x = 71489.55$

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Step-by-step explanation:

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