The height of the travel box version is 2 cm.
Dilation is the increase or decrease in the size of a figure by a factor k to create and image. Both the figure and image are similar, hence the ratio of their corresponding sides are congruent.
Let h represent the height of the travel box, hence:
h / 8 = 306 / 1224
h = 2 cm
The height of the travel box version is 2 cm.
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