Quincy and Julie are in charge of making a banner for the game this Friday. How much poster paper will they need for a parallelogram-shaped banner with a height of 3 1/2 feet and a base of 5 1/4 feet?

18.375 ft²

Step-by-step explanation:

Given that,

Quincy and Julie want to make a banner of size 3 1/2 feet by 5 1/4 feet for the game this week.

To find,

poster paper needed to make banner

Formula to be use is surface area of parallelogram (base * height)

= (21/4) * (7/2)

= 18.375 ft²

So poster paper required to make banner for the game this Friday = 18.375 ft²