What is the sum of the geometric sequence 2, 10, 50, … if there are 7 terms?

The geometric sequence is found by the relation of 2 to 10 and 10 to 50. 2x 5 =10 and 10 x5 =50. so 50 x 5 = 250, 250 x 5 =1250, 1250 x 5 =6250, 6250 x 5 =31250. Add them together and it is 39,062. So the answer is A.