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Chapter 8: Q. 9 (page 540)
Find the area of each triangle. Round answers to two decimal places
The area of the triangle is sq. units
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Rework Problem 8 under the same conditions except that, at time t = 0, the object is at its resting position and moving down.
Finding the Height of an Airplane An aircraft is spotted by two observers who are 1000 feet apart. As the airplane passes over the line joining them, each observer takes a
sighting of the angle of elevation to the plane, as indicated in the figure. How high is the airplane?
Time Lost due to a Navigation Error In attempting to fly from city P to city Q, an aircraft followed a course that was 10掳 in error, as indicated in the figure. After flying a distance
of 50 miles, the pilot corrected the course by turning at point R and flying 70 miles farther. If the constant speed of the aircraft was 250 miles per hour, how much time was lost due
to the error?
Construction A loading ramp 10 feet long that makes an angle of 18掳 with the horizontal is to be replaced by one that makes an angle of 12掳 with the horizontal. How long is the
new ramp?
Solve each triangle.
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