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Verdich [7]
3 years ago
10

Please help! Question above

Mathematics
1 answer:
LiRa [457]3 years ago
5 0

Answer:

4

Step-by-step explanation:I just took the quiz

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What is the product of 5−2i and 3−4i?<br> Enter your answer, in standard form, in the box
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Answer:

\boxed{7-26i}

Step-by-step explanation:

The binomials are multiplied in the usual way, using FOIL or the distributive property:

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Since i² = -1, this becomes ...

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3 years ago
To measure a stone face carved on the side of a​ mountain, two sightings 900 feet from the base of the mountain are taken. If th
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Answer:

Height of the stone​ face = 66.29 feet

Step-by-step explanation:

Refer the given figure, here we need to find height of the stone​ face,

Height of the stone​ face = CD

CD = AD - AC

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             tan31=\frac{AC}{AB}\\\\tan31=\frac{AC}{900}\\\\AC=540.77feet

In ΔABD we have

             tan34=\frac{AD}{AB}\\\\tan34=\frac{AD}{900}\\\\AD=607.06feet

CD = AD - AC = 607.06 - 540.77 = 66.29 feet

Height of the stone​ face = CD = 66.29 feet

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