Answer:
ok so it is 22 c 3 for this answer
To determine the common ratio of the geometric sequence, divide the second term with the first term. 480 divided by 768 equals 5/8. Further, the ratio of the third and second terms may be used to check the consistency of the common ratio. The ratio is also 5/8. Thus, the common ratio is 5/8.
Factors of 5: 1, 5
factors of 10: 1, 2, 5, 10
we can see that that common factors of 5 and 10 are 1 and 5 because both of the numbers are factors of 5 and 10
