When erik went to bed one winter night in northern minnesota, the temperature was -2°f. by the time he got up the next morning, the temperature had dropped to -17°f. assuming the temperature dropped steadily through the night, what was the temperature in the middle of the night?

-19°f
-9.5°f
-15°f
-8.5°f

Two trains leave a station on different tracks. the tracks make an angle of 130°, with the station as a vertex. the first train travels 100 km and makes its first stop at point a, while the second train travels 200 km and makes it first stop at point b. how far apart are the trains when both are at their first stop? round the answer to the nearest integer. a) 65 km b) 139 km c) 224 km d) 275 km