To find out how many notebooks will fit on Teresa's bookshelf, divide the remaining space on the bookshelf (24 inches) by the width of each notebook (38 inches):
Number of notebooks that will fit = Remaining space / Width of each notebook
Number of notebooks that will fit = 24 inches / 38 inches ≈ 0.6316 (rounded to 4 decimal places)
Since you can't have a fraction of a notebook, Teresa can fit 0 notebooks with 24 inches of space remaining. In practical terms, if she needs to fit notebooks, she may need to consider a different arrangement or use a narrower type of notebook.