3 years ago

9+1/2(7n-26)-8n simplify

Mathematics

1 answer:

Savatey [412]3 years ago

8 0

9 + (7n - 26)/2 - 8n
9 + 7n/2 - 13 - 8n
-4 + 3.5n - 8n
-4 - 4.5n

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A life guard in a tower 20 ft above sea level spots a struggling surfer at an angle of depression of 15 . How far is the surfer

GalinKa [24]

Answer: $19.31\ ft$

Step-by-step explanation:

Given

The tower is at a height of $h=20\ ft$

the angle of depression is $15^{\circ}$

Suppose the surfer is x ft away from the base of the tower

$\therefore \text{From the figure, we can write}\\\\\Rightarrow \cos 15^{\circ}=\dfrac{x}{h}\\\\\Rightarrow x=h\cos 15^{\circ}\\\Rightarrow x=20\cos 15^{\circ}\\\Rightarrow x=19.31\ ft$

Therefore, the surfer is at a distance of 19.31 ft from the base of the tower.

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PolarNik [594]

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bogdanovich [222]

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Mazyrski [523]

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