Three co-workers want to fill a friends office with balloons as a joke. the room is 8ft high,9ft long, and 11ft wide. of 3 balloons fill 1 cubic foot how many balloons will they need to fill the office

First, find the volume, which is the amount of space in the room.
8 x 9x 11
=792 ft^3

Now we need to find the amount of balloons it takes to fill the room.

3 ballons:1 ft^3 = 2376 balloons: 792 ft^3

3 x 792
=2376 ballons

2376 balloons are needed to fill the office.

The discount is 8.70 . you dont tell us the percent of tax added so there is no way to find out, unless i'm not seeing anything. without tax its 37.70