Answer:
The diameter of the new cake will be 9.8 inches.
Explanation:
Mrs. Smith's cake has a diameter of 7 inches and a height of 5.5 inches.
Now, she wants to design a new cake by dilating the dimensions of the original cake by a scale factor of 1.4.
Therefore, each dimension of the old cake will be multiplied by factor 1.4.
Therefore, the diameter of the new cake will be (7 × 1.4) = 9.8 inches. (Answer)