Solve the problem. See ExampleEXAMPLE Solving a Problem Involving SubtractionThe record-hi...
Solve the problem. See Example
EXAMPLE Solving a Problem Involving Subtraction
The record-high temperature in the United States is 134°F, recorded at Death Valley, California, in 1913. The record low is −80°F, at Prospect Creek, Alaska, in 1971. See FIGURE. What is the difference between these highest and lowest temperatures? (Source: National Climatic Data Center.)
FIGURE
We must subtract the lowest temperature from the highest temperature.
The difference between the two temperatures is 214°F.
A pilot announces to the passengers that the current altitude of their plane is 34,000 ft. Because of turbulence, the pilot is forced to descend 2100 ft. Write the new altitude as a signed number.
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