Please help I don’t know the answer
The last option is none of the above

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

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Factor the expression using gcf 9b+45