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If the dimensions of a rectangular prism are 5 ft x 3.5 ft x 2 ſt, what is the surface area?

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?