I need the steps and answers please

Which equation represents the partial sum of the geometric series?

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?

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