Need !

need on question 5.

what do i

Break up the model into 2 pieces. It seems like you've already split it, across the side by where it says 2 cm.

The volume of the top will be 5x4x5. You can see the top is 5, along the side is 4, and you find the bottom by subtracting 2 and 2 from 9.

The volume of the top is 100 cm^3

The volume of the bottom is 9x5x3. All these side measurements are given.

The volume of the bottom is 135 cm^3.

Add the two measurements together.

The total volume is 235 cm^3, or A

Well, if you are looking to see if she is right or not, then no, she is not.
This is because when you are multiplying a whole number by a decimal, the product will always be smaller.
So if the decimal is bigger, then the product will be smaller.
Hope that helped