Answer :
Final answer:
The record high temperature of 97.7 degrees above zero can be expressed as +97.7 in its standard form and as -97.7 to represent the equivalent value on a negative scale, even if that is not physically possible for temperature.
Explanation:
To express the record high temperature for a date as a positive and a negative number, we need to represent the value both as it is typically measured above zero, and also how it would be represented if it were below zero. The record high temperature is 97.7 degrees above zero. Therefore, as a positive number, it remains +97.7, but if this temperature were somehow below zero, which is not physically possible for temperature but mathematically representable, it would be expressed as -97.7. Hence, the correct representation of the quantity as a positive and negative number is option A) +97.7 and -97.7.
Learn more about Positive and Negative Numbers here:
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