Quiz 4-6 Identify the DOMAIN of these relation Represent the relation with a mapping diagram is the relation a function?
{(2, -8), (2, 7), (7-2), (-7. 7) (-8,9))

This is so hard and it’s for a test

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

2.5 milligrams is equivalent to how many grams