Roberto has plans to build a tree house in a large oak tree in his backyard. He takes measurements from the ground and uses trigonometry to estimate how tall the tree house can be. Twenty feet from the base of the tree, Roberto measures a 26.6° angle of elevation to the proposed bottom of the tree house and a 42° angle of elevation to the proposed top of the tree house. If Roberto is 6 ft tall, will there be enough room for him to stand inside the tree house?

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Exercise: Computing Distances in an Application
PDF Transcript for Exercise: Computing Distances in an Application
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26. Roberto has plans to build a tree house in a large oak tree in his backyard. He takes measurements from
the ground and uses trigonometry to estimate how tall the tree house can be. Twenty feet from the base
of the tree, Roberto measures a 26.6° angle of elevation to the proposed bottom of the tree house and a
42° angle of elevation to the proposed top of the tree house. If Roberto is 6 ft tall, will there be enough
room for him to stand inside the tree house?
581
27. A police officer hiding between two bushes 50 ft from a straight highway sights two points A, and B. The
angle from the police car to A is 62°, and the angle to point B is 72°.
50 ft
62°
72
B
a. Find the distance between A and B. Round to the nearest foot.
b. Suppose that a motorist takes 2.7 sec to pass from A to B. Using the rounded distance from part (a),
find the motorist's speed in ft/sec. Round to 1 decimal place.
c. Determine the motorist's speed in mph. Round to the nearest mph.
Answers
28. A large weather balloon is tethered by two ropes. One rope measures 23 ft and attaches to the balloon at
an angle of 32° from the ground. The second rope attaches to the base of the balloon at an angle of 15°
with the ground.
a. How far from the ground is the balloon floating? Round to the nearest tenth of a foot.
b. Find the length of the second rope. Round to the nearest tenth of a foot.
c. If both ropes suddenly detach and the balloon rises straight up at a rate of 3 ft/sec, how long will it
take the balloon to reach a height of 50 ft from the ground? Round to the nearest tenth of a second.
Transcribed Image Text:y! does long.. jump to pg W Megarhys.. B Course S. Bb https://ac. x A eB wit. search edoOK UUOK CoLents Exercise: Computing Distances in an Application PDF Transcript for Exercise: Computing Distances in an Application Answers 26. Roberto has plans to build a tree house in a large oak tree in his backyard. He takes measurements from the ground and uses trigonometry to estimate how tall the tree house can be. Twenty feet from the base of the tree, Roberto measures a 26.6° angle of elevation to the proposed bottom of the tree house and a 42° angle of elevation to the proposed top of the tree house. If Roberto is 6 ft tall, will there be enough room for him to stand inside the tree house? 581 27. A police officer hiding between two bushes 50 ft from a straight highway sights two points A, and B. The angle from the police car to A is 62°, and the angle to point B is 72°. 50 ft 62° 72 B a. Find the distance between A and B. Round to the nearest foot. b. Suppose that a motorist takes 2.7 sec to pass from A to B. Using the rounded distance from part (a), find the motorist's speed in ft/sec. Round to 1 decimal place. c. Determine the motorist's speed in mph. Round to the nearest mph. Answers 28. A large weather balloon is tethered by two ropes. One rope measures 23 ft and attaches to the balloon at an angle of 32° from the ground. The second rope attaches to the base of the balloon at an angle of 15° with the ground. a. How far from the ground is the balloon floating? Round to the nearest tenth of a foot. b. Find the length of the second rope. Round to the nearest tenth of a foot. c. If both ropes suddenly detach and the balloon rises straight up at a rate of 3 ft/sec, how long will it take the balloon to reach a height of 50 ft from the ground? Round to the nearest tenth of a second.
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