A) it is the first one because when A / B = C you check it this way A = C * B
10 is the stubstitution for 5 q, since 2 plus 5 equals 7. What is 10 divided by 5?
When you look at the table, find the y value that has equivalent values on both sides. For example, the y value for the vertex here is 10. After it, the values are 7,-2, and 17, and above it, the values are 7 and -2. This value should also be either the largest y value or smallest y value (depending on whether the parabola opens up or down).
I believe you mean volume, not area, since the height is given as well.
If the first cake and the second cake are the same size, they'd have the same area and the same volume.
Ratio between 1st pieces and 2nd pieces:
24:40 = 6:10
= 3:5
So for every 3 pieces from the first cake, you get 5 pieces from the second cake.
Therefore, your volume of each piece of the second cake should be 45 cm^3.
Since the height is given as 3 cm, the area of each piece of the second cake should be 15 cm^2. (45/3 = 15)
Working with whole numbers (i'm assuming), the possible dimensions of the second cake pieces would be: 5 cm x 3 cm x 3 cm (and since 3 and 5 are the only integer factors of 15).
Your answer: width x length = 5 cm x 3 cm (or vice versa)