Final answer:
The difference between the highest temperature of 97° and the lowest temperature of -90° in Seattle last year is 187 degrees Fahrenheit, which is calculated by adding the absolute values of the two temperatures.
Step-by-step explanation:
To find the difference between the highest and lowest temperatures in Seattle last year, where the highest was 97° and the lowest was -90°, we calculate the difference as follows:
- Take the highest temperature, which is 97°.
- Take the absolute value of the lowest temperature, which is 90° (ignoring the negative sign for this operation).
- Add these two values together.
- The difference is 97° + 90°, which equals 187°.
The difference between the highest and lowest temperatures for the year in Seattle was 187 degrees Fahrenheit.