Final answer:
To find the length of the prism, you can use the formula for volume and solve for the length. In this case, the length is 11 cm.
Step-by-step explanation:
To find the length of the rectangular prism, we can use the formula for volume: V = lwh. We have the width (w) and height (h) of the prism as 9 cm and 7 cm respectively, and the volume (V) as 693 cubic centimeters. Substituting these values into the formula, we get 693 = l(9)(7). To find the length (l), we divide both sides of the equation by 9 and 7, which gives us l = rac{693}{9 imes 7} which simplifies to l = 11 cm.