The force, F (Newtons), between two objects is inversely proportional to the square distance, d (metres), between them. d The force is 0.012 Newtons when the distance between the objects is 1.4 metres. Work out d (rounded to 2 DP) when F = 0.035 Newtons. What is d

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