Answer:
-15 is colder than the others
Step-by-step explanation:
It is colder because it is in the negatives but it also has a higher absolute value
Because without place value you might put the decimal in the wrong place and that will effect the answer big time.
The length of that semi circle is 6pi. So the perimeter should be 6pi + 24
The average of both sides are the same.
Hope I helped! ( Smiles )