Which of the following statements about the normal distribution is false?
A) About 50% of the area lies within two standard deviations of the mean.
B) About 99.7% of the area lies within three standard deviations of the mean.
C) About 68% of the area lies within one standard deviation of the mean.
D)About 95% of the area lies within two standard deviations of the mean.

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