Can someone me determine 7th term in the geometric sequence whose first term is 5 and whose common ratio is 2

an=a1⋅rn−1, where  an  is the nth term,  a1  is the first term, n is the number of the term, and r is the common ratio

so  a7=3⋅37−1a7=3⋅36a7=3⋅729a7=2,187

both ways get you to the same answer that the 7th term in that geometric sequence is 2, 187 .

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.