An airplane over the Pacific Ocean sights an atoll at an 13° angle of depression. If the plane is 752 m above the water, how many kilometers is it from a point 752 m directly above the atoll?
A.

3.26 km

B.

173.61 km

C.

1624.12 km

D.

3257.27 km

HELP IM SO CONFUSED I HAVE NO IDEA WHAT TO DO!!!

Question

An airplane over the Pacific Ocean sights an atoll at an 13° angle of depression. If the plane is 752 m above the water, how many kilometers is it from a point 752 m directly above the atoll?
 A.	
 
3.26 km
 
 B.	
 
173.61 km
 
 C.	
 
1624.12 km
 
 D.	
 
3257.27 km
 
HELP IM SO CONFUSED I HAVE NO IDEA WHAT TO DO!!!

jhannybean · Answer

Didn't you just have this question posted?

anonymous · Answer

it reposted! i don't know why

campbell_st · Answer

draw a diagram 

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noe find x using the tan ratio

your answer will be in metres so divide by 1000 to get kilometres

anonymous · Answer

A

whpalmer4 · Answer

Alternative approach: remembering that the earth is roughly spherical, contemplate how many of those answers are plausible when you are only 752 meters above the surface...

The rough formula is about 3.5 km * the square root of your height in meters.