Which term of the sequence is 7.5?

If this is the complete question with its accompanying choices:

Which term of the sequence is 7.5?

n = 1, 2, 3, 4

h (n) = 60, 30, 15, 7.5

a) 1st

b) 2 nd

c) 3rd

d) 4th

Then 7.5 is the 4th term ...

If n = 1, then h (n) = 60

If n = 2, then h (n) = 30

If n = 3, then h (n) = 15

If n = 4; then h (n) = 7.50

The succeeding number is equal to 1/2 of the preceding number.

The 4th term. I just took the test