To solve the problem in the image:

We are given that the storage bin is a rectangular prism with:

• Base area = 21 square feet
• Height = 4.5 feet

The formula to calculate the volume $V$ of a rectangular prism is:

$V = \text{Base Area} \times \text{Height}$

Substituting the given values:

$V = 21 \, \text{square feet} \times 4.5 \, \text{feet}$

Now, performing the multiplication:

$V = 94.5 \, \text{cubic feet}$

Thus, the volume of Oprah's storage bin is 94.5 cubic feet.

Do you need further clarification or details?

Here are 5 related questions for practice:

1. What is the volume of a rectangular prism with a base area of 30 square feet and a height of 6 feet?
2. If the height of the bin were doubled, what would be the new volume?
3. How do you calculate the surface area of a rectangular prism?
4. What would happen to the volume if both the base area and height were halved?
5. If the volume of a bin is 150 cubic feet and the base area is 25 square feet, what is its height?

Tip: Always ensure units are consistent when performing volume calculations!