the circle graph shows hamburger sales by various restaurants in a recent year. The total sales were $40 billion
That's a statement, not a question!
To answer questions related to the circle graph showing hamburger sales by various restaurants in a recent year, we will need to use the information provided. In this case, the total sales being $40 billion.
To find the answer to specific questions about the data, we will need to examine the graph and calculate proportions or percentages based on the given information.
Please provide the specific question you would like me to answer using the circle graph data.