Final answer:
The annual dividend payout for an investor owning 100 shares in Langley Enterprises, which pays a constant dividend of $0.85 per share, would be $85.
Step-by-step explanation:
To calculate the annual dividend payout, you multiply the constant dividend per share by the number of shares owned. In this case, the constant dividend is $0.85 and the investor owns 100 shares. Therefore, the annual dividend payout would be $0.85 x 100 = $85.