Question

jenny determined that the diagonal of her laptop screen is 2 (square root 42) inches long. what is the approximate length, to the realest inch, of the diagonal of her laptop screen?

Answer 1

13 inches

1) Gathering the data

Jenny's laptop screen = 2√42

Sketching it

If the diagonal is approximately 2√42 we can say that the most real length of that laptop screen is 2√42=12.96 ≅ 13 inches. Since we had to round that up.