2 years ago

Is this a function yes / no

Mathematics

1 answer:

Doss [256]2 years ago

3 0

Answer:

yes

Step-by-step explanation:

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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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2 years ago

Find the midpoint of the line segment from (1,-1) to (2,4)

Helga [31]

Answer: (1.5, 1.5)

Step-by-step explanation:

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2 years ago

Solve for x -12+4=100

strojnjashka [21]

Answer by JKismyhusbandbae:

$x-12+4=100\\\mathrm{Add/Subtract\:the\:numbers:}\:-12+4=-8\\x-8=100\\\mathrm{Add\:}8\mathrm{\:to\:both\:sides}\\x-8+8=100+8\\\mathrm{Simplify}\\x=108$