Determine whether each sequence is geometric. If so, find the common ratio. 1. 3,9, 27, 81, ...
2. 4, 8, 16, 32, ...
3. 4, 8, 12, 16,
4.4,-8, 16,-32, ...
5.1, 0.5, 0.25, 0.125,...
6. 100, 30,9, 2.7, ...
7.-5, 0, 5, 10, ..
8. 64, -32, 16, -8,...
9. 1,4,9,16,

One month, a music site observed that 60% of the people who downloaded songs from its site downloaded q sam's latest single. the equation below represents this information, where x represents the total number of people who ddownloaded songs from the site that month: x = 0.6x + 384 how many people who downloaded songs from the site that month downloaded q sam's latest single?

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?

If the value of cos330°is√3/2 then find cos 165°.