The table provides the temperature (in °F) in five cities at 6 a.m. on the same day. Let's use this information to answer the questions:
(a) The question asks for the temperature in Chicago at noon, given that the temperature in Chicago rose by 18 °F from 6 a.m. to noon. To find the temperature at noon, we need to add 18 °F to the temperature at 6 a.m. in Chicago, which is -9 °F. Adding 18 °F to -9 °F gives us a temperature of 9 °F at noon in Chicago.
Therefore, the temperature in Chicago at noon was 9 °F.
(b) To determine how much higher the temperature in Dayton was compared to Fairbanks at 6 a.m., we need to subtract the temperature in Fairbanks from the temperature in Dayton. The temperature in Dayton is 42 °F, while the temperature in Fairbanks is -35 °F.
Subtracting -35 °F from 42 °F gives us 77 °F.
Therefore, the temperature in Dayton was 77 °F higher than in Fairbanks at 6 a.m.