Explanation: I’m pretty sure you’re looking for the perimeter. Therefore, since you have a rectangle, you’ll have 4 sides. The measures are 100 by 140 so you’ll put 100 and 140 on the other sides and simply add them up.
The possible dimensions of the prism will be evaluated as follows: <span>60x3 + 145x2 + 70x factoring out factoring out 5x we get: 5x(12x^2+29x+14) factoring the quadratic we get: 5x(3x+2)(4x+7) hence the dimensions are: 5x by (3x+2) by (4x+7)</span>