Ineed to find the dimensions but i have to sep up two equations to find out

What is the range of the data below? .8090100

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?

15/16 as a decimal rounded to the nearest hundredth