Perpendicular means crossing so it would be a right angle. Therefore the 2 times will be
9:00 and 3:00
When the hour hand is at the 9 it will be perpendicular to the minute hand because they will be crossing paths if you extend the arms in both directions. The same with 3
It is D because they cannot be negative feet away and if the fisherman is 12ft above water and the diver is 40ft below than 40 + 12 = 52. Hope this helps.
