Suppose a triangle has side a b and c and that a^2+b^2 is greater than c^2/ Let theta be the measure of the angle opposite the side of length c. Which of the following must be true:
A. cos theta is greater than 0
B. The triangle is a right triangle.
C. The triangle is not a right triangle.
D. Theta is an acute angle

The null and alternate hypotheses are: h0: μ1 ≤ μ2 h1: μ1 > μ2 a random sample of 22 items from the first population showed a mean of 113 and a standard deviation of 12. a sample of 16 items for the second population showed a mean of 99 and a standard deviation of 6. use the 0.01 significant level. find the degrees of freedom for unequal variance test. (round down your answer to the nearest whole number.) state the decision rule for 0.010 significance level. (round your answer to 3 decimal places.) compute the value of the test statistic. (round your answer to 3 decimal places.) what is your decision regarding the null hypothesis? use the 0.01 significance level.