Answer:
the measure of the exterior angle is 87 degrees.
Given :
A boat is being pulled into a dock with a rope attached to the boat at water level. When the boat is 12 feet from the dock, the length of the rope form the boat to the dock is 3 feet longer than twice the height of the dock above the water.
To Find :
The height of the dock.
Solution :
This will make a right angle triangle as given in link below .
Now , applying Pythagoras theorem :

Now , h = 5 or h = -9 .
Now , height cannot be negative .
So , height of the dock is 5 ft .
Hence , this is the required solution .
Elevation above sea level = 2x+50
rock climbers minute of climbing = x
2x + x + 50
3x + 50
The decimal for this fraction is 5.5
Answer:
10.5
Step-by-step explanation:
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