Final answer:
It cannot be definitively determined whether racism and sexism are on the decline in sports in the United States due to mixed evidence of both progress and continuing disparities.
Step-by-step explanation:
Whether racism and sexism are on the decline in sports in the United States cannot be determined definitively due to the complex nature of social issues and varying interpretations of data and events. While there have been significant strides towards equality in sports, such as increased visibility and activism against racism, and steps towards gender equity, incidents that highlight ongoing disparities, like the inequality at NCAA national tournaments and the fight for equal pay in soccer, suggest that these issues are still prevalent in the sports industry. It's important to consider that societal attitudes and institutional practices vary across different sports and contexts, making a categorical answer difficult to ascertain.