A pelican dives vertically from a height of 3.8 m above the water. It then catches a fish 2.3 m underwater.
a) Write an expression using rational numbers to represent the length of the pelican's dive
b) How long is the pelican's dive?
a) Your equation using rational numbers is going to represent an integer or a fraction because it says to use rational numbers.
The book wants to know how far the pelican dived, so you have to subtract a negative integer to make it seem like its adding (kind of).
3.8 - (-2.3) = 6.1 m
b) see above.
The pelican dove 6.1 meters to get the fish.