Final answer:
Factors affecting a firm's weighted cost of capital include interest rates, expectations of future profits, and financial capital sources.
Step-by-step explanation:
There are several factors that can affect a firm's weighted cost of capital. One important factor is interest rates. Lower interest rates can stimulate investment spending, while higher interest rates can reduce it. Another factor is expectations of future profits. When businesses expect the economy to grow and see opportunities for increased profits, they are more likely to invest. Lastly, financial capital sources can also influence a firm's cost of capital. The way a business chooses to raise funds, such as through borrowing or selling stock, can impact its cost of capital.