HELP BRAINLY, I NEED HELP WITH THESE QUESTIONS!
(05.05 LC)
A right rectangular prism is shown.

What shape best describes the cross-section cut at an angle to the base of a right rectangular prism? (1 point)

Trapezoid
Parallelogram
Square
Rectangle
10.
(05.05 MC)
Find the area of a triangle with a base length of 3 units and a height of 4 units. (1 point)

3 square units
6 square units
7 square units
8 square units
11.
(05.05 MC)
Erin covered a box with contact paper. The dimensions of the box are shown in the figure below:

A rectangular prism is shown. The length of the rectangular prism is labeled as 11 inches, the height is labeled as 9 inches and the width is labeled as 8 inches.
The contact paper costs 8¢ per square inch. She will only pay for the contact paper used to cover the box, even if there is waste or extra. How much money did Erin spend on the contact paper? (1 point)

$20.72
$41.44
$48.12
$73.14