Solution
Given the dimensions of a rectangular prism as
length: 1.5 ft
width: 1 ft
Height: 2.5 ft
Part A.
Volume of a rectangular prism =


Volume of small cubes

Number of small cubes that can be packed in a rectangular prism is 30

Hence, there are 30 small cubes that can be packed in the rectangular box.
Part B.
The volume is given as
![\sqrt[3]{30}=3.12](https://img.qammunity.org/2023/formulas/mathematics/college/cvnnxenhac3ji9tlqcj1hqpa73jtf1t9s1.png)