Kamille is calculating the length of diagonal on a picture board and gets a solution of the square r

Kamille is calculating the length of diagonal on a picture board and gets a solution of the square root of 58. She needs to buy the ribbon to put across the diagonal of the board, so she estimates that she will need at least 60 inches of ribbon to cover the diagonal. Is she correct? Explain.

The square root of 58 has an answer between 7 and 8.

So Kamille is incorrect. She needs much less than 60 inches of ribbon. She needs less than 8 inches of ribbon.