Aduck is sitting on a ledge that is 11 feet above the
surface of a pond. the duck dives 27 feet straight down
to get food at the bottom of the pond. which expression
represents the position of the bottom of the pond, in
feet, relative to its surface level?
a 27 + 11
c 11 - (-27)
b 27 + (-11)
d 11 + (-27)