5. A three-digit number is to be made using the digits 1, 3, 5, and8 How many numbers can be made repeated digits are allowed

I'm working with permutations ​

Select a graph that have an equation with a < 0

What numbers are included in the set of integers? what numbers are not included?

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?