Bettie55

01.06.2021 • 

Mathematics

A bridge is going to be built across a river. To determine the width of the river, a surveyor on one bank sights the top of a pole, which is 3 meters high, on the opposite bank. His optical device is mounted 1.2 meters above the ground. The angle of elevation to the top of the pole is 8.5 degrees. How wide is the river? Round your answer to the nearest hundredth of a meter.

Ответ:

krystlemiller4307

30.12.2020

Mathematics

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b7.8−2.15=0.128205b+−2.15
  so for example using 2 for b
27.8−2.1527.8−2.15=−1.89359

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