Can you help with pre algebra questions

Find the 8th term in this geometric sequence.
8, 4, 2, 1, ...

Find the common ratio for the following geometric sequence.
3, 15, 75, 375, 1875, ...

Find the 10th term in the geometric sequence.
25, 5, 1, 0.2, ...

What is the common ratio in this geometric sequence?
3, 3/2, 3/4, 3/8, 3/16

Determine the ratio of the geometric sequence.
3, 18, 108, 648, 3888, ...

Find the 8th term in this geometric sequence.
8, 4, 2, 1, ...

a = 8
r = 4/8 = 1/2

so a8 = ar^(7) = 8/2^7 = 1/16

Find the common ratio for the following geometric sequence.
3, 15, 75, 375, 1875, ...

common ratio = ratio of any 2 consecutive terms = 15/3 =5

Find the 10th term in the geometric sequence.
25, 5, 1, 0.2, ...

a = 25
r = 1/5

a1= = ar^9 = 25/5^9 = 1/5^7 = 1/78125

What is the common ratio in this geometric sequence?
3, 3/2, 3/4, 3/8, 3/16

common ratio = (3/2)/3 = 1/2

Determine the ratio of the geometric sequence.
3, 18, 108, 648, 3888, ...

common ratio = 18/3 = 6

1=.03125
2=Multiply by 5
3=.00125
4=denominator*2
5.multiply by 6

1) 1/16
2) 5
3) .0000128
4) 1/2
5) 6