How wide is a poster that has a length of 9/2 feet and area of 45/4 square feet?

A=LW, area equals the product of the length times the width, so we can say:

W=A/L, we are told that A=45/4 and L=9/2 so:

W=(45/4)/(9/2) ft

W=(45/4)*(2/9)=90/36 ft

W=5/2 ft

W=2.5 ft.

The answer to that is 6