At 4: 00 a. m,the outside temperature was -3°f. by 4: 00p. m that day, it rose 23 degrees. what was the temperature at 4: 00 p. m?

The beginning temp for that day was -3°, the ending temp was 23° greater/higher. That means that we should take the starting temp (-3°) and add 23°:
-3+23=20

Therefore, the temp at 4pm would be 20°F

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