The percentage increase in the temperature of the piece of metal is 12.5%.
Option B) is the correct answer.
Percent increase is simply the amount of increase from the initial value to the new value in terms of 100 parts of the initial value.
It is expressed as;
C = ((x₂ - x₁) / x₁)100%
Where x₁ is initial value and x₂ is new value
Given the data in the question;
C = ((x₂ - x₁) / x₁)100%
C = ((36°C - 32°C) / 32°C)100%
C = ( 4°C / 32°C )100%
C = ( 0.123 )100%
C = 12.5%
The percentage increase in the temperature of the piece of metal is 12.5%.
Option B) is the correct answer.
Learn more about Percentages here: brainly.com/question/24159063
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