The temperature has decreased by 4 degrees Celsius.
We have a temperature change from 3 degrees below zero at midnight to 7 degrees below zero at 2 a.m.
We have to determine how much did the temperature decrease.
' The temperature of an area is x degrees below zero '. What does this statement mean ?
A temperature of x degrees below zero means that the temperature of an area is equal to = - x degrees i.e., T = 0 - x = - x.
According to question -
Initial Temperature T(i) = 0 - 3 = - 3 degrees
Final temperature T(f) = 0 - 7 = - 7 degrees
Change in temperature ΔT = T(f) - T(i) = -7 - (-3) = -7 + 3 = - 4
Hence, the temperature has decreased by 4 degrees Celsius.
To solve more questions on temperature variation, visit the link below -
https://brainly.com/question/18153046
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