Trenton gave a total of 3 packs of baseball cards to his friends.

the area is: 90 square inches

Step-by-step explanation:

Since you use the same amount of material to create the rectangle, that means that the area of a parallelogram has the same formula as the area of a rectangle. That is:

Area of  parallelogram = base x height

In our case: 9 in x 10 in = 90 square inches