Suppose you have a box with 3 blue marbles, 2 red marbles, and 4 yellow marbles. you are going to pull out one marble, record its color, put it back in the box and draw another marble. what is the probability of pulling out a red marble followed by a blue marble? be sure to reduce your answers. a. 6/81 = 2/27
b. 6/18 = 1/3
c. 5/9
d. 5/18

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

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?