A hot-air balloon descends at a rate of 18 feet per minute. How far will the balloon descend in 10.6 minutes?

The balloon descends at a rate of 18 feet per minute, so in 10.6 minutes, it will descend 18 * 10.6 = <<18*10.6=190.8>>190.8 feet. Answer: \boxed{190.8}.