<span><u><em>The correct answer is: </em></u> dilation and rotation.
<u><em>Explanation</em></u><span><u><em>: </em></u> Rotations, reflections and translations are known as rigid transformations; this means they do not change the size or shape of a figure, they simply move it. These rigid transformations preserve congruence.
Dilation, however, are not rigid transformations, since they change the size of a shape. Dilation would not change the shape, just the size; the angle measures would be the same, and the ratio of corresponding sides would be equal to the scale factor used in the dilation. This would give us a similar, but not congruent, figure.</span></span>
For this case, the first thing we must do is calculate the total cost. We have then: C = (16) * (2.4) * (6) C = 230.4 $ Then, the change it receives is given by: 250 - 230.4 = 19.6 $ Answer: He has received 19.6 $ from $ 250