Since the top of the person's head is above the water (by 1.6 feet), that means the water is less than 5.8 feet (the person's height). So we have to subtract 5.8 - 1.6, and I believe the answer will be 4.2 feet. The pool is 4.2 feet deep :)
Step-by-step explanation: Parallel slopes are the same and perpendicular slopes have a product of -1 and since the slopes of both lines do not satisfy these it is neither