Achemist measured the temperature change in a container of heated oil as it cooled. she recorded a change of −19.5 degrees celsius in 2.4 minutes.

what is the average change in temperature per minute?

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-8.1  first you need to figure out what to divide the 2.4 by to get a one, once you get that you divide the -19.5 by that number. So 2.4 divided by 2.4 equals 1 so you divide the -19.5 by 2.4 to get -8.125 which you round to the nearest tenth so it would be -8.1

The answer is 26 to 1