A(4,3), b(-3,4) and c (b, 15) are vertices of a triangle. D is midpoint of Ab and e is on ac such that de is parallel to BC. Find the length of DE, the length of the area of a triangle ABC to the area of triangle ADE, what type of figure is DBEC? Give a reason for your answer​

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.