Select the correct answer. The formula for the area of a trapezoid is A = 1/2(b1+b2)h. Which formula could be used to determine b1 when the other variables are known?
A b1 = 2/Ah +b2
B b1= Ah/2 - b2
C b1= 2A/h +b2
D b1= 2A/h - b2

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.