Suppose a train leaves Deb's house and travels at 60 mph. Four hours later, another train leaves from Deb's house on the track beside or parallel to the first train but it travels at 180 mph. How far away from Deb's house will the faster train pass the other train? Define your variables. Write and solve a system of equations. Clearly answer the question. SHOW WORK

On a certain portion of an experiment, a statistical test result yielded a p-value of 0.21. what can you conclude? 2(0.21) = 0.42 < 0.5; the test is not statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 21% of the time, so the test is not statistically significant. 0.21 > 0.05; the test is statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 79% of the time, so the test is not statistically significant. p = 1 - 0.21 = 0.79 > 0.05; the test is statistically significant.