12. 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.
- 3.8 - ( -2.3) because 3.8 represents the height above the water the pelican is at and 2.3 represents how deep the the fish underwater is.
b) How long is the pelican's dive?
- The pelican's dive is 6.1 m because you add the two numbers together (3.8 and 2.3), which is the pelican's dive altogether (it dove 3.8 above water and 2.3 underwater).