Estaban wants marble bookends cut at a 60° angle, as shown. If Estaban wants his bookends to be between 7.5in and 8in. Tall, what length d should the marble cutter make the base of the book ends? Explain.

The domain of a function can be represented by which one of the following options? o a. a set of output values o b. a set of f(x) values o c. a set of input values o d. a set of both input and output values