What is the sum of the geometric sequence 1,3,9, if there are 13 terms

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

Gail is making costumes for a school play. each rabbit costume needs one and one half yards of white fur fabric, a yard of blue striped fabric, and a quarter of a yard of pink felt for the ears. g? ail needs to make eight rabbit man yards will she need, for the white fur fabric, blue striped fabric, and pink felt?

Could somebody me with this radical simplification?