In the figure below, the segments PQ and PR are tangent to the circle centered at 0. Given that OQ=3.9 and OP=6.5, find PR.
PR = 0

which of the following sets of data would produce the largest value for an independent-measures t statistic? the two sample means are 10 and 20 with variances of 20 and 25 the two sample means are 10 and 20 with variances of 120 and 125 the two sample means are 10 and 12 with sample variances of 20 and 25 the two sample means are 10 and 12 with variances of 120 and 125

Asix-sided number cube is rolled twice. what is the probability that the first roll is an even numbe and the second roll is a number greater than 4?

Ali was paid $75 for mowing a neighbor''s yard. this is one fourth of the amount of money she earned all summer