Answer :
It will take at least 39.5 minutes to raise the temperature of the magnesium sample to its melting point.
B. m ≥ 39.5
Formula:
[tex]m ≥ (650 - 255)/10[/tex]
We can use the formula [tex]m ≥ (650 - 255)/10[/tex] to solve for the number of minutes (m) needed to raise the temperature of the magnesium from 255 degrees to the melting point of 650 degrees.
First, we subtract the initial temperature of 255 degrees from the melting point of 650 degrees. This gives us 395.
Then, we divide 395 by 10, which is the number of degrees the temperature is increasing every minute. This gives us the result of 39.5 minutes.
Therefore, the answer is m ≥ 39.5, which means that it will take at least 39.5 minutes to raise the temperature of the magnesium to the melting point.
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