Aright rectangular prism is sliced perpendicular to its base as shown in the figure. what is the shape of the resulting two-dimensional cross section? select from the drop-down menu to correctly identify the cross section. the shape of the resulting two-dimensional cross section is ,octagon, trapizoid, rectangle

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?