Ascientist is cooling a liquid at a steady rate. the temperature of the liquid changed by −82 1/2 °c over 2 1/5 minutes. what was the temperature change after 1 minute? enter your answer as a mixed number, in simplest form

Hey there, Emily!

To solve for this one, or to find the rate per minute, we need to divide how much it changed by how long it took.
So, -82  divided by 
But first, we need to convert the fractions into improper fractions by following the following formula
(Just replace the letters for the numbers)
Once we turn them into improper fractions, we will get
and 
Now, we need to divide them and to do so, you have to multiply  by the reciprocal of  which is  and we get a total of  and simplified will be -37.5 degrees per minute.

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It’s c. i’m almost sure