What is the 4th term in a geometric sequence for which a1=10 and r=.5

Ahomeowner plans to hang wallpaper on one wall of a bedroom that is 10 feet long if a stripe of wallpaper is 20 inches wide and stripes or hung vertically how many stripes on wall paper with the homeowner required

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?